Black River Tactical; Black River Tactical. Products [3] Sort by: Submit. Quick View. BRT 12.5" OPTIMUM Hammer Forged Chrome Lined Barrel W/Gas Tube. $340.00 $250.00 Sale. In Stock. Select Options. Quick View. BRT M4A1 Bolt Carrier Group C158 HPT/MPI Auto. $169.00. Out of Stock. Add To Cart ...A hammer forged chrome lined barrel for 300 BLK chamber with 1/5 twist and B3 barrel extension. Designed for accuracy, durability and suppressor compatibility in subsonic …Installation is extremely easy and should take less than 10 minutes, start to finish. This is an application specific EZTUNE Gas Tube for 14" - 16" barrels with CAR length gas system using standard ammo and buffer systems. Features The BRT EZTune Gas Tube reduces gas system flow and corrects excessive gas drive from barrels with large gas ports.The new (relatively) Covert Comp by Black River Tactical is a unique combination muzzle device that provides flash suppression, recoil compensation, and a low blast signature. The Covert Comp we have in stock is the fluted model for looking cooler.We would like to show you a description here but the site won’t allow us.Black River Tactical Standard Rifled Chrome Lined Barrels are designed and built to meet the needs of serious shooters who demand accuracy and durability along with seamless suppressor compatibility. Black River Tactical SR CL barrels start with a high grade stress relieved blank using a 6R button rifling process and certified material. The ...Canik Mete MC9 Holster – IWB Kydex Holster. Rated 5.00 out of 5 based on 4 customer ratings. ( 4 customer reviews) $ 59.99. The best Canik Mete MC9 Holster on the Market! Inside the Waistband Holster. Adjustable Retention. . 100% Handcrafted in the U.S.A. Custom Molded for a Perfect Fit. Shop BRT Black River Tactical Store Covert Comp OPTIMUM EZTUNE Gas Tube MicroTUNE Gas Block CustomTUNE Gas Port MicroPin Gas Block Mk12 Gas Tube BRT EXT BRT EXC BRT ... Muddy River Tactical : Color black : Material kydex : Manufacturer Muddy River Tactical : Part Number MrPro : Style Adjustable : Hand Orientation Flat Black- Right Handed : Additional Information. ASIN : B07485TQWR : Customer Reviews: 4.5 4.5 out of …Black River Tactical (BRT) Black River Tactical (BRT) 1; Bootleg, Inc Bootleg, Inc 1; CMMG CMMG 1; Lantac USA Lantac USA 1; San Tan Tactical San Tan Tactical 1; SLR Rifleworks SLR Rifleworks 4; Fit. AR-10 / LR-308 / SR-25 1; AR-15 / M4 / M16 5; Color. Black Black 8; Size.625" 1.750" 1; Gas Tubes . Show sidebar . Show 9 12 18 24Black River Tactical LLC. 2,302 likes · 3 talking about this. Innovating the AR Platform.Black River Tactical LLC 11.5” optimum suppressed only barrel. @ripcord industries rail Rex Silentium MG7 suppressor. Onyx Arms stubby grip SIONICS Weapon Systems NP3 BCG Cloud Defensive ODG Rein 2.0 EOTECH ODG XPS2 Unity Tactical ODG riser B5 Systems stock and grip Forward Controls Design small parts and trigger guard.Finished with two sticky sharp River2Sea black nickel short shank treble hooks, the River2Sea Tactical DD Crankbait is a must-have for every anglers crankbait box. River2Sea: Length: Weight: Depth: Class: Hook: Tactical DD Crank ... I’ve seen the tactical bassin videos and tried my hand at deep cranking with some results (with other cranks ...The Black River Tactical barrel is CHF and chrome-lined, and they use what they call a medium-light taper profile. BRT also uses a proprietary gas length for this particular barrel, which they call EXC length. The barrel description includes a few references to both suppressed and unsuppressed use, and this length falls between carbine and ... BRT 11.5" OPTIMUM SR Chrome Lined Barrel. BBL-11.5-SRCL. $255.00 Black River Tactical M4A1 Bolt Carrier Group - Carpenter 158 - HPT/MPI Auto. SKU. BRT00286. $159.00. Out of stock. Notify me when this product is in stock. Add to Wish List. Black River Tactical M4A1 Bolt Carrier Group - Carpenter 158 - HPT/MPI Auto. Description. Limit (2) Per Order.Black River Tactical HF CL barrels deliver the performance to get the job done in demanding real world conditions. This barrel can be pinned and welded up to a non-NFA length using a muzzle device over 2.070" long and is a perfect match for a 13" long hand guard. Some examples:Smith & Wesson M&P 22 Magnum Holster – Outside the Waistband Kydex. $ 59.95. The best Smith & Wesson M&P 22 Magnum Holster on the Market! Outside the Waistband Holster. Sweat Shield to protect your body as well as make re-holstering a breeze. Ships in 4-5 Business Days! Handcrafted with .80 Kydex. Concealment Belt Loops fit 1.5″ Belts.BRT Cold Hammer Forged Barrel AR-15 5.56 NATO AR15, M16, M4 Made in USA. BRT 10.3" Cold Hammer Forged Govt Barrel. BRT 10.3" Cold Hammer Forged Govt Barrel. …BRT is damn good for suppressor usage as it's gas ports are super tight. Downside to this is that you have more of a chance of malfunction if you use steel or cheap ammo, since their gas production varies. I love my CORE personally, and it gives me good reliability between suppressed and unsuppressed fire. Black River Tactical HF CL barrels deliver the performance to get the job done in demanding real world conditions. Features. 1/5 Twist for improved terminal performance of expanding subsonic projectiles. Also provides enhanced stability with long, heavy subsonic projectiles through suppressors. Anyone have experience with Black River Tactical’s CHF Optimum barrels? I’m interested in their 16” Intermediate gas barrel. People speak highly of them but there isn’t much information out there about accuracy. There aren’t any other CHF chrome lined barrels with intermediate gas systems that I’m aware of.Black River Tactical. Grid View. List View. Products [3] Sort by: Submit. Quick View. Black River Tactical BRT 11.5" OPTIMUM Hammer Forged Chrome Lined Barrel - BBL-11.5-HFCL - Nashville Plow Works. $425.00. In Stock. Free Shipping. (0) Add To Cart Add to Cart. Quick View. Black River Tactical BRT 12.5" OPTIMUM MRC Barrel ... BRT Full auto bolt carrier group BCG for AR15, M16, M4, AR-15 The Carpenter 158 bolt is shot peened, HP/MPI tested and fully Hard Chromed. The USGI full auto bolt carrier is Hard Chrome lined inside and Manganese Phosphate coated outside. The Mil-Spec gas key is Chrome Lined and secured with properly staked Grade 8 fasteners 100% made in USA to ... Black River Tactical http://www.blackrivertactical.com/concrete5/Black River Tactical PRO 5.56 Barrels are designed and built to meet the needs of professional shooters who require a balance of accuracy, durability, and value. BRT …Rated 4.90 out of 5 based on 10 customer ratings. ( 10 customer reviews) $ 59.99. The best Springfield Hellcat RDP with Optic IWB Kydex Holster on the Market! Covers compensator. Cut for Optic on Slide. Adjustable Retention. . 100% Handcrafted in the U.S.A. Custom Molded for a Perfect Fit.MSRP: $749.00. Availability: Available. Spec Sheet. Buy Now. Simple, one-button takedown for quick and easy field-stripping and proper chamber-to-muzzle cleaning. Pressing a button in the back of the frame allows the barrel-receiver assembly to tilt up and off the grip frame without the use of tools. One-piece, precision CNC-machined grip frame.Black Ops Exterminator 8" Full Metal Revolver - Gun Metal Finish - Pellet Cartridges Available $84.99 $94.99. Sale. Exterminator BB Revolver Cartridges - .177 Caliber 4.5mm Steel BBs- Refurb $8.99 $10.99. Sale. SHOP ALL AIRSOFT. SHOP ALL BB/PELLET. Black Ops USA makes high quality airsoft and pellet gear. We have a wide selection of models ...Muddy River Tactical : Color black : Material kydex : Manufacturer Muddy River Tactical : Part Number MrPro : Style Adjustable : Hand Orientation Flat Black- Right Handed : Additional Information. ASIN : B07485TQWR : Customer Reviews: 4.5 4.5 out of …Jan 30, 2015 · Black River Tactical claims that their Covert Comp, a linear compensator with a unique internal geometry, suppresses flash nearly as well as an A2 flash suppressor. I found that to be true on a 16″ barrel but the biggest surprise was the Covert Comp’s performance on an 11.5″ barrel. BRT 10.3" Cold Hammer Forged Govt Barrel. BBL-10.3-CHF. $300.00 Shop BRT Black River Tactical Store Covert Comp OPTIMUM EZTUNE Gas Tube MicroTUNE Gas Block CustomTUNE Gas Port MicroPin Gas Block Mk12 Gas Tube BRT EXT BRT EXC BRT PDW Pistol Carbine Mid Midlength Rifle Upper Receiver Group Bolt Carrier Group Barrels Muzzle Devices Adjustable Gas Drive AR15 LMT. This is an application specific EZTUNE Gas Tube ... Shop BRT Black River Tactical Store Covert Comp OPTIMUM EZTUNE Gas Tube MicroTUNE Gas Block CustomTUNE Gas Port MicroPin Gas Block Mk12 Gas Tube BRT EXT BRT EXC BRT ... Black River Tactical. BRT 12.5" OPTIMUM HF CL Barrel. This BRT Barrel INCLUDES: BRT EXC Gas Tube . Black River Tactical Hammer Forged Chrome Lined Barrels are designed and built to meet the needs of serious shooters who demand the highest levels of accuracy and durability along with seamless suppressor compatibility. We take great pride in our work and making these products right here in the U.S.A. Our Glock 19 Holsters are all custom made to fit your Glock 19 perfectly. All our products are backed by our NO Questions Asked Lifetime Warranty. If anything should ever happen to your holster simply let us know and we will either fix or replace FREE of charge. Black River Tactical. BRT - 11.5" OPTIMUM SR Chrome Lined Barrel - 5.56 Carbine Gas. (No reviews yet) Write a Review. SKU: BBL-11.5-SRCL. MPN: BBL-11.5-SRCL. Availability: In stock if you can add to cart! Shipping: Calculated at Checkout. MSRP: $265.00. $251.95. — You save $13.05. or 4 interest-free payments of $62.99 with. ⓘ. Add to Wish List. Black River Tactical Standard Rifled Chrome Lined Barrels are designed and built to meet the needs of serious shooters who demand accuracy and durability along with seamless suppressor compatibility. Black River Tactical SR CL barrels start with a high grade stress relieved blank using a 6R button rifling process and certified material. The ...Black River Tactical EZTUNE Gas Tubes w/ Roll Pin. SKU. BRT00279. As low as $49.95. In stock. Gas System. Length. Qty-+ Add to Cart. Add to Wish List Add to Compare. Black River Tactical EZTUNE Gas Tube. Description. The BRT EZTune Gas Tube reduces gas system flow and corrects excessive gas drive from barrels with large gas ports. ...Black River Tactical M4A1 BCG is a Full Auto Bolt Carrier Group made to current USGI M4A1 specifications. Full Auto Bolt Carrier Group BCG for the AR Family of Weapons (AR-15, M16, M4) Carpenter 158 bolt is Shot Peened, HP tested and MP inspected. The USGI full auto bolt carrier is Hard Chrome lined inside and Manganese Phosphate coated outside.Rated 4.91 out of 5 based on 11 customer ratings. ( 11 customer reviews) $ 64.95. The Best Enigma Holster on the market! Made to work with the Phlster Enigma Chassic System. COMES STANDARD WITH OUR CLAW ATTACHMENT SO THAT IT WILL WORK WITH THE ” PHLSTER ENIGMA ” SYSTEM. Adjustable Retention!Learn how to correct overgassing issues on the AR platform with products from Black River Tactical, a company that offers gas control solutions for overgassed rifles. The owner, Clint Lupton, explains the …Black River Tactical Standard Rifled Chrome Lined Barrels are designed and built to meet the needs of serious shooters who demand accuracy and durability along with seamless suppressor compatibility. Black River Tactical SR CL barrels start with a high grade stress relieved blank using a 6R button rifling process and certified material. The ...Black River Tactical http://www.blackrivertactical.com/concrete5/The Black River Tactical MarkBlue Gas Tube is a premium quality gas tube used exclusively with the BRT EXC length gas system. The BRT EXC gas system was created to provide OPTIMUM performance from 12.5" 5.56 barrels and is excellent for dedicated suppressed 11.5" barrels. The BRT EXC gas system is longer than the standard CAR length, but ... Do I go with a 13.7 BA Hanson Barrel for about $250 or a 12.5 Black River Tactical barrel for about $350? Both come with a pinned lo-pro gas block. BRT has a custom gas length between carbine and mid. And the BRT 6P rifling supposedly gets extra FPS for the length. BA Hanson has an NiB barrel extension. Other than that, they both have a QPQ finish. Jan 5, 2023 · Black River Tactical has sold at least three differently constructed versions of their 16” Optimum barrel. This article showcases the cold hammer forged version that’s constructed of 4150 CrMoV steel. This barrel has a chrome-lined bore and chamber and a manganese phosphate exterior finish. The BRT CHF Optimum barrels have a 1:7” twist ... Black River Tactical M4A1 BCG is a Full Auto Bolt Carrier Group made to current USGI M4A1 specifications. Full Auto Bolt Carrier Group BCG for the AR Family of Weapons (AR-15, M16, M4) Carpenter 158 bolt is Shot Peened, HP tested and MP inspected. The USGI full auto bolt carrier is Hard Chrome lined inside and Manganese Phosphate coated outside. Soft Leather – IWB Leather Holster. Rated 4.93 out of 5. $ 39.95 Select options. Click Here to View our Holster Collections. Holsters. Click Here to View our Gun Belts. Gun Belts. Click Here to view our Apparel. Merchandise.To attract customers, Muddy River Tactical tends to hold a big sales promotion. Shopping on Muddy River Tactical, you can save $24.45 on average with Gun Belts as low as $44.99 at Muddy River Tactical. A lot of special offers, like Muddy River Tactical Coupons, are waiting for you. Don't let such a good chance slip. Act now!Black River Tactical LLC 11.5” optimum suppressed only barrel. @ripcord industries rail Rex Silentium MG7 suppressor. Onyx Arms stubby grip SIONICS Weapon Systems NP3 BCG Cloud Defensive ODG Rein 2.0 EOTECH ODG XPS2 Unity Tactical ODG riser B5 Systems stock and grip Forward Controls Design small parts and trigger guard.Black River Tactical HF CL barrels deliver the performance to get the job done in demanding real world conditions. This barrel can be pinned and welded up to a non-NFA length using a muzzle device over 2.070" long and is a perfect match for a 13" long hand guard. Some examples: BRT Full auto bolt carrier group BCG for AR15, M16, M4, AR-15 The Carpenter 158 bolt is shot peened, HP/MPI tested and fully Hard Chromed. The USGI full auto bolt carrier is Hard Chrome lined inside and Manganese Phosphate coated outside. The Mil-Spec gas key is Chrome Lined and secured with properly staked Grade 8 fasteners 100% made in USA to ... BRT 8.0" OPTIMUM PDW Hammer Forged Chrome Lined Barrel - 556. BBL-8.0-HFCL556. $225.00 Learn how to correct overgassing issues on the AR platform with products from Black River Tactical, a company that offers gas control solutions for overgassed rifles. The owner, Clint Lupton, explains the … The Black River Tactical Pinnable Gas Block is designed to be easily pinned to the barrel in addition to set screw mounting, for a maintenance free, reliable solution. It features a flat, center spotted face that allows for easy drilling and installation of the coil pin. Springfield Hellcat Pro Holster – Inside the Waistband Kydex Holster. $ 59.99. The best Springfield Hellcat Pro Holster Holster on the Market! Inside the Waistband Holster. Adjustable Retention. . 100% Handcrafted in the U.S.A. Custom Molded for a Perfect Fit. Adjustable Cant Angle. Lifetime Warranty.301 W Mitchell Hammock Rd. Suite 1001. Oviedo, FL 32765. [email protected] (407)454-0003 BRT OPTIMUM 11.5 Upper Receiver Group Barrel: BRT OPTIMUM CQB 11.5" Gas System: CAR Length, Optimized for 11.5" Hand Guard: 10" Modular or M-LOK rail. Upper: Forged from 7075 USGI M4 Upper w/ dry film lube. Upper is test fired before shipping. NFA Rules Apply 100% made is USA. BRT Full auto bolt carrier group BCG for AR15, M16, M4, AR-15 The Carpenter 158 bolt is shot peened, HP/MPI tested and fully Hard Chromed. The USGI full auto bolt carrier is Hard Chrome lined inside and Manganese Phosphate coated outside. The Mil-Spec gas key is Chrome Lined and secured with properly staked Grade 8 fasteners 100% made in USA to ... Something went wrong. There's an issue and the page could not be loaded. Reload page. 4,009 Followers, 187 Following, 68 Posts - See Instagram photos and videos from Black River Tactical LLC (@blackrivertactical)Black River Precision “Pure Poison” turkey guns are built on 870 or 1187 platforms. ... BRP also offers a tactical precision rifle model Tango Down chambered in .308 Win or .300 Win Mag. Sparrow Hawk. 3250.00. Starting with a blueprinted action, the Sparrow Hawk can be built on any cartridge with a .223 Remington bolt face. ...Black River Tactical; Black River Tactical. Products [3] Sort by: Submit. Quick View. BRT 12.5" OPTIMUM Hammer Forged Chrome Lined Barrel W/Gas Tube. $340.00 $250.00 Sale. In Stock. Select Options. Quick View. BRT M4A1 Bolt Carrier Group C158 HPT/MPI Auto. $169.00. Out of Stock. Add To Cart ... BRT 10.3" Cold Hammer Forged Govt Barrel. BBL-10.3-CHF. $300.00 AR12 (10)RD 12ga Magazine BLACK RIVER. Sale. $59.33 $51.24. Out of Stock. Blog. Terms and Conditions. Product Index. Category Index.FN Reflex Holster – Inside the Waistband Kydex Holster. $ 59.99. The best FN Reflex Holster on the Market! . 100% Handcrafted in the U.S.A. Custom Molded for a Perfect Fit. Adjustable Cant Angle. Lifetime Warranty. Colors and Hand. Black River Tactical (BRT) Show sidebar . Show 9 12 18 24 -5%. Compare. BRT Micro Pin Gas Block – .750″ Out of stock $ 59.95 $ 56.96. View product. Compare. BRT ... Springfield Hellcat Pro Holster – Inside the Waistband Kydex Holster. $ 59.99. The best Springfield Hellcat Pro Holster Holster on the Market! Inside the Waistband Holster. Adjustable Retention. . 100% Handcrafted in the U.S.A. Custom Molded for a Perfect Fit. Adjustable Cant Angle. Lifetime Warranty.Something went wrong. There's an issue and the page could not be loaded. Reload page. 4,009 Followers, 187 Following, 68 Posts - See Instagram photos and videos from Black River Tactical LLC (@blackrivertactical)40.9 cm. MSRP: $1339.00. Availability: Limited Availability. Spec Sheet. Buy Now. Simple, rugged, Garand-style action with breech bolt locking system, a fixed-piston gas system and self-cleaning moving gas cylinder gives unparalleled reliability under harsh operating conditions. Threaded barrel with factory-installed flash suppressor is cold ...The Tactical Basin Plan actions identified in the Plan will protect or improve rivers, lakes, and wetlands through cost-effective projects, including floodplain restorations, dam removals and 15 other types of projects. ... The Black River has a mainstem length of 40 miles and drains an area of 202 square miles. It is formed at the outlet of ... Black River Tactical HF CL barrels deliver the performance to get the job done in demanding real-world conditions. Features: Hammer Forged for extreme durability and accuracy. BRT’s precision hammer forging process produces an exceptionally straight and smooth bore finish with ideal land and groove profiles, all of which are key to ... We would like to show you a description here but the site won’t allow us. BRT 11.5" OPTIMUM SR Chrome Lined Barrel. BBL-11.5-SRCL. $255.00 We would like to show you a description here but the site won’t allow us. Canik Mete MC9 Holster – IWB Kydex Holster. Rated 5.00 out of 5 based on 4 customer ratings. ( 4 customer reviews) $ 59.99. The best Canik Mete MC9 Holster on the Market! Inside the Waistband Holster. Adjustable Retention. . 100% Handcrafted in the U.S.A. Custom Molded for a Perfect Fit.The Covert Comp MINI is a great general purpose muzzle device and makes shooting more enjoyable. Made from through hardened Chrome-Moly steel for maximum strength and toughness. Finished with corrosion resistant Melonite treatment. Includes wrench flats for easy installation. Measures 1.500” in length and .8635” (22mm) diameter.Black River Tactical Hammer Forged Chrome Lined Barrels are designed and built to meet the needs of serious shooters who demand the highest levels of accuracy and durability …Black River Tactical http://www.blackrivertactical.com/concrete5/MSRP: $749.00. Availability: Available. Spec Sheet. Buy Now. Simple, one-button takedown for quick and easy field-stripping and proper chamber-to-muzzle cleaning. Pressing a button in the back of the frame allows the barrel-receiver assembly to tilt up and off the grip frame without the use of tools. One-piece, precision CNC-machined grip frame.Free Consultation. At Black River Dog Training, we offer professional dog training services that are designed to help your furry friend become a well-behaved and obedient companion. For over 7 years, we have been serving the pets and families of our local area. We love caring and connecting with animals and creating everlasting relationships.Gas tube: mixed suppressed use, CAR A5H2 and Sprinco GreenSteel case first for lock backM855 for 5.56 pressure testingWorked well but A5H1 might be better fo...
Black River Tactical has sold at least three differently constructed versions of their 16” Optimum barrel. This article showcases the cold hammer forged version that’s …. Musinsa usa
The Tactical Basin Plan actions identified in the Plan will protect or improve rivers, lakes, and wetlands through cost-effective projects, including floodplain restorations, dam removals and 15 other types of projects. ... The Black River has a mainstem length of 40 miles and drains an area of 202 square miles. It is formed at the outlet of ... Black River Tactical HF CL barrels deliver the performance to get the job done in demanding real world conditions. Note: The 12.5" BRT barrel has a proprietary length gas system and ships with the EXC Gas Tube. Features: Hammer Forgedfor extreme durability and accuracy. Black River Tactical offers high-quality barrels, uppers, BCG, gas systems, muzzle devices and more for AR15 and 9mm AR platforms. Browse featured products, on sale items and …Shop BRT Black River Tactical Store Covert Comp OPTIMUM EZTUNE Gas Tube MicroTUNE Gas Block CustomTUNE Gas Port MicroPin Gas Block Mk12 Gas Tube BRT EXT BRT EXC BRT PDW Pistol Carbine Mid Midlength Rifle Upper Receiver Group Bolt Carrier Group Barrels Muzzle Devices Adjustable Gas Drive AR15 LMT. BRT Full auto bolt carrier and key for AR15, M16 ...Black River Tactical is pleased to announce our latest innovation, the 16" OPTIMUM Barrel It is the culmination of over a year's worth of research, design and testing. More details available in the For Sale Thread Features BRT OPTIMUM Light Weight Tapered Profile (.625 Gas Block)A hammer forged chrome lined barrel for 300 BLK chamber with 1/5 twist and B3 barrel extension. Designed for accuracy, durability and suppressor compatibility in subsonic …Learn how to correct overgassing issues on the AR platform with products from Black River Tactical, a company that offers gas control solutions for overgassed rifles. The owner, Clint Lupton, explains the …Rated 4.90 out of 5 based on 10 customer ratings. ( 10 customer reviews) $ 59.99. The best Springfield Hellcat RDP with Optic IWB Kydex Holster on the Market! Covers compensator. Cut for Optic on Slide. Adjustable Retention. . 100% Handcrafted in the U.S.A. Custom Molded for a Perfect Fit.Black River Precision “Pure Poison” turkey guns are built on 870 or 1187 platforms. ... BRP also offers a tactical precision rifle model Tango Down chambered in .308 Win or .300 Win Mag. Sparrow Hawk. 3250.00. Starting with a blueprinted action, the Sparrow Hawk can be built on any cartridge with a .223 Remington bolt face. ... Black River Tactical BRT - EZTUNE Gas Tube - Preset - MID 14" - 16" Rating Required Select Rating 1 star (worst) 2 stars 3 stars (average) 4 stars 5 stars (best) Black River Tactical also uses first (ex. [email protected]) and first [1 letter] + last (ex. [email protected]) as email structures. Black River Tactical's uses up to 3 different email patterns. Get validated email … BRT OPTIMUM 11.5 Upper Receiver Group Barrel: BRT OPTIMUM CQB 11.5" Gas System: CAR Length, Optimized for 11.5" Hand Guard: 10" Modular or M-LOK rail. Upper: Forged from 7075 USGI M4 Upper w/ dry film lube. Upper is test fired before shipping. NFA Rules Apply 100% made is USA. The Black River Tactical MarkBlue Gas Tube is a premium quality gas tube used to complete an AR with a carbine or midlength gas system. The distinctive “MarkBlue” dot allows easy identification of a genuine BRT gas tube and guaranteed performance. It is compatible with BRT MicroPin Gas Blocks, front site bases and low profile gas blocks..