Brownells Brn-4 Barrels 5.56x45mm - Brn-4 16" Barrel Medium Profile 1-7 1/2-28"

Brownells Brn-4 Barrels 5.56x45mm - Brn-4 10.4" Barrel Heavy Profile 1-7 1/2-28"

Brownells BRN-4 HK 416 compatible barrels, available in a variety of lengths and two contours. Historically extremely hard to procure, HK 416 compatible barrels are now available as part of the BRN-4 lineup. These barrels machined by Faxon, fit early... ... more

Brownells Brn-4 Barrels 5.56x45mm - Brn-4 14.5" Barrel Medium Profile 1-7 1/2-28"

Brownells BRN-4 HK 416 compatible barrels, available in a variety of lengths and two contours. Historically extremely hard to procure, HK 416 compatible barrels are now available as part of the BRN-4 lineup. These barrels machined by Faxon, fit early... ... more

Brownells Brn-4 Barrels 5.56x45mm - Brn-4 14.5" Barrel Heavy Profile 1-7 1/2-28"

Brownells BRN-4 HK 416 compatible barrels, available in a variety of lengths and two contours. Historically extremely hard to procure, HK 416 compatible barrels are now available as part of the BRN-4 lineup. These barrels machined by Faxon, fit early... ... more

Brownells Brn-4 Stripped Barrels Chrome Lined - Brn-4 16" Barrel Medium Chrome Lined/Phosphate 5.56x

Brownells BRN-4 HK 416 compatible barrels, available in a variety of lengths and two contours. Historically extremely hard to procure, HK 416 compatible barrels are now available as part of the BRN-4 lineup.These barrels machined by Faxon, fit early... ... more

Brownells Brn-4 Assembled Upper Receivers - Brn-4 16" Assembled Upper Receiver Heavy Barrel

Assembled from All New Components Fits Standard AR-15 Lowers The BRN-4 Upper Receiver is now available as an Assembled Upper, with Barrel and Gas System installed. Simply add your preferred HK 416 compatible handguard and any 1/2-28 muzzle device, and... ... more

Brownells Brn-4 Stripped Barrels Chrome Lined - Brn-4 13.7" Barrel Medium Chrome Lined/Phosphate 5.5

Brownells BRN-4 HK 416 compatible barrels, available in a variety of lengths and two contours. Historically extremely hard to procure, HK 416 compatible barrels are now available as part of the BRN-4 lineup.These barrels machined by Faxon, fit early... ... more

Brownells Brn-4 Assembled Upper Receivers - Brn-4 16" Assembled Upper Receiver Medium Barrel

Assembled from All New Components Fits Standard AR-15 Lowers The BRN-4 Upper Receiver is now available as an Assembled Upper, with Barrel and Gas System installed. Simply add your preferred HK 416 compatible handguard and any 1/2-28 muzzle device, and... ... more

Brownells Brn-4 416 Gas Blocks - Brn-4 416 Type Gas Block For 14.5/16in Barrels

New Manufacture Gas Blocks for 416 Type Barrels & Firearms These new production 416 type Gas Blocks are machined from billet steel to provide long life, during the most extreme use. To ensure high performance, the Gas Blocks are machined from 4140/42... ... more

Brownells Brn-4 Assembled Upper Receivers - Brn-4 14.5" Assembled Upper Receiver Heavy Barrel

Assembled from All New Components Fits Standard AR-15 Lowers The BRN-4 Upper Receiver is now available as an Assembled Upper, with Barrel and Gas System installed. Simply add your preferred HK 416 compatible handguard and any 1/2-28 muzzle device, and... ... more

Brownells Brn-4 Assembled Upper Receivers - Brn-4 14.5" Assembled Upper Receiver Medium Barrel

Assembled from All New Components Fits Standard AR-15 Lowers The BRN-4 Upper Receiver is now available as an Assembled Upper, with Barrel and Gas System installed. Simply add your preferred HK 416 compatible handguard and any 1/2-28 muzzle device, and... ... more

Brownells Brn-4 416 Gas Blocks - Brn-4 416 Type Gas Block For 10.4in Barrels

New Manufacture Gas Blocks for 416 Type Barrels & Firearms These new production 416 type Gas Blocks are machined from billet steel to provide long life, during the most extreme use. To ensure high performance, the Gas Blocks are machined from 4140/42... ... more

Brownells Brn-4� Firing Pin Spring - Brn-4 Firing Pin Spring

Replacement or spare part for the BRN-4 Bolt Carrier Group. Handy to have on-hand for a backup parts kit. Only fits Brownells BRN-4 Bolt Carrier Group. Mfg: Brownells ... more

Brownells Brn-4� Bolt Assembly - Brn-4/416 Bolt Assembly

Replacement or spare Bolt Assembly for the Brownells BRN-4. Completely assembled with ejector and extractor. Black nitride finished exterior makes for an extremely hard and durable part. Compatible with HK416 and MR556 rifles. Nitride finish Complete... ... more

Brownells Brn-4 416/Mr556 Complete Bolt Carrier Group - Brn-4 416 Type Complete Bcg Nitride

BRN-4 Complete Bolt Carrier Group for 416 Type Firearms This Completely assembled BRN-4 Bolt Carrier Group is ready to drop into HK 416, MR556 or other compatible upper receivers & firearms. Utilizing high quality materials, finishes and inspection... ... more

Brownells Brn-4 Gas Block Coil Pins 2-Pack - Brn-4 Gas Block Coil Pins, 2-Pack

Gas block coil pins for the BRN-4. These pins are the correct size pins to use with the Brownells BRN-4 gas blocks and all the BRN-4 barrels. These pins will also work with the HK416/MR556 platform as well. Packaged two per pack. Mfg: Brownells ... more

Brownells Brn-4/Hk416 Compatible Piston Assembly - Brn-4 416 Compatible Piston Rod Assembly

U.S. made gas piston assembly for the Heckler & Koch 416, 417, MR556, MR762, G28, G36 and SL8 firearms. High quality replacement or build component. Stainless steel piston, includes gas rings. Mfg: Brownells ... more

Brownells Brn-4� Firing Pin - Brn-4 Firing Pin

Replacement or spare part for BRN-4 bolt carrier groups. Chrome plated finish to provide corrosion resistance and lubricity. Use only with the BRN-4 bolt carrier group. Mfg: Brownells ... more

Brownells Brn-4/Hk416 Compatible Piston Rod Assembly - Brn-4 416 Compatible Operating Rod Assembly

U.S. made operating rod assembly for the Heckler & Koch 416, 417, MR556, MR762 and G28 firearms. High quality replacement or build component. Includes complete operating rod assembly with spring installed. Mfg: Brownells ... more

Brownells Brn-4/Hk416 Compatible Gas Rings - Brn-4 416 Gas Ring 3 Pack

U.S. made gas rings for the Heckler & Koch 416, 417, MR556, MR762, G28, G36 and SL8 firearms. Includes the 3 needed for a complete installation or replacement of worn out rings. Mfg: Brownells ... more

Brownells Brn-4 Barrel Nut

The BRN-4 Barrel Nut is the perfect barrel nut for your BRN-4, HK416, or MR556 built. Machined to exact dimensions to work with HK style handguards. Recommended Barrel Nut Torque: 50-80 ft/lbs Mfg: Brownells ... more

Brownells Brn-4 Barrel Nut Wrench

The Correct Tool for Safe Installation/Removal of Barrel Nuts on H&K Rifles as well as BRN-4 Rifles! This wrench is a necessary tool if you need to assemble one (or several) of our BRN-4 setups. Actually this tool is a must-have item for anybody who... ... more

Brownells Brn-4 Buffer Retainer

The BRN-4 Buffer Retainer is the perfect buffer retainer for HK416 or MR556 type firearms. Machined from stainless steel to exacting dimensions. Will not work in AR-15/M16 firearms. BRN-4 or HK416/MR556 lower receiver with roll pin retention of the... ... more

Brownells Upper Receiver Bushing For Hk416 & Mr556 - Brn-4 Upper Receiver Op Rod Bushing For Hk416 &

U.S. made aftermarket replacement upper receiver op rod bushing for the Heckler & Koch 416 or MR556 Rifles. Mfg: Brownells ... more

Brownells Ar-15/M16 Dissipator Barrel 16" 5.56 1-8 - 16" Lightweight Dissipator Barrel 1-8 Rifle Len

Dissipator style barrel, rifle length gas system paired with 16 inch length. The rifle length gas system on this 16 inch 223 Wylde chambered barrel allows for a soft shooting configuration and fine tuning to your rifle build. With the longer gas... ... more

Brownells Ar-15 12.7" A1 Carbine Barrel Assembly - Ar-15 A1 12.7 Carbine Barrel Assembly 1-7 Fsb

Introducing the Brownell's Retro A1 12.7" carbine length barrel assembly. Chambered in 5.56x45mm NATO, the chrome lined barrel is available with your choice of 1-7" or 1-12" rifling and finished in black phosphate with an overall length of 12.7".... ... more

Brownells Ar-15 12.7" A1 Carbine Barrel Assembly - Ar-15 12.7" A1 Carbine Barrel 1-12 Twist Assembly

Introducing the Brownell's Retro A1 12.7" carbine length barrel assembly. Chambered in 5.56x45mm NATO, the chrome lined barrel is available with your choice of 1-7" or 1-12" rifling and finished in black phosphate with an overall length of 12.7".... ... more

Brownells Ar-15 16" Upper Receiver Assemblies 5.56mm - Brn-15 16" Upper Receiver Assy .625" W/ Ch &

Manufactured in the US with the highest quality components, the BRN-15 Upper Receiver Groups are great starts for your next build. The BRN-15 Upper Receiver Groups feature a 5.56x45mm NATO chambered, nitride finished barrel, available in several... ... more

Brownells Ar-15 Lightweight Carbine Barrels - Ar-15 16" A1 Barrel 1/2-28" Chrome Moly Nitride

The base barrel configuration needed for a fast handling, lightweight barrel. Brownells Lightweight Carbine Barrels come in a variety of popular lengths, ready to suite any new carbine build. Manufactured to Brownells specifications by Rosco... ... more

Brownells Ar-15 Premium Lightweight Barrels 223 Wylde - 16" Lightweight Barrel 1-8 Tw Mid-Length 1/2

Premium barrel configuration for hard use with classic hard chrome bore and chamber. The Brownells Premium Lightweight Carbine Barrels come in a variety of popular lengths, ready to suite any new carbine build. Ballistic Advantage is manufacturing... ... more

Brownells Ar-15 10mm Auto Barrels 4150 Steel - 10mm Auto Barrel 10.5" 1-16 Twist 4150 Steel

The Brownells 10mm Auto AR-15 barrel allows fans of the powerhouse 10mm cartridge to built an AR-style carbine or pistol chambered in their favorite pistol round, enhancing its usability with a new platform. The Brownells 10mm Auto AR-15 barrel is... ... more

Brownells Hk417 Style Barrel 7.62mm Nato 16in Isonite - Hk417/Mr762 16" 7.62mm Nato Barrel With Ison

For those on the search for a perfect barrel to fit a reproduction build of the Heckler & Koch HK417, this Brownells HK417 Style Barrel is made right here in the USA as an option for HK fans building their next homage rifle. Each Brownells HK417 Style... ... more

Brownells Barrel Vise Bushings - #16 3/4" Octagon Aluminum Barrel Vise Bushing

Aluminum, split barrel bushings come in eight different hole sizes and one, special, pre-machined bushing to make this universal Barrel Vise system the very first choice of professional gunsmit hs. Steel Bushings provide years of service, plus have the... ... more

Brownells Barrel Vises W/ Bushings - Barrel Vise With #16 Aluminum Bushing I.D. Octagon Bbl.

To complement our "Ring-Of-Steel" Action Wrench System, we've developed the only professional-quality Barrel Vise that will positively clamp and keep even the tightest barrel from turning during removal. Machined from solid steel for durability to... ... more

Brownells Ar-15/M16 Dissipator Barrel 16" 5.56 1-8 - 16" A1 Rifle M4 Chrome Lined Bbl W/ Pinned Fsb

Dissipator style barrel, rifle length gas system paired with 16 inch length. The rifle length gas system on this 16 inch 223 Wylde chambered barrel allows for a soft shooting configuration and fine tuning to your rifle build. With the longer gas... ... more

Brownells Shotgun Barrel Polishing Flex Hone - 16 Gauge Fine Flex Hone, Bore

Hundreds of abrasive "balls" mounted on a flexible shaft - the fastest, easiest way we've come across to clean and polish older barrels or put a mirror polish in new ones. For used barrels, the Medium-Coarse hone, followed by the Fine, removes rough... ... more

Brownells Shotgun Barrel Polishing Flex Hone - 16 Gauge Fine Flex Hone, Chamber

Hundreds of abrasive "balls" mounted on a flexible shaft - the fastest, easiest way we've come across to clean and polish older barrels or put a mirror polish in new ones. For used barrels, the Medium-Coarse hone, followed by the Fine, removes rough... ... more

Brownells Ar-15/M16 Receiver Taps & Dies - 1 3/16"-16 Tpi Die

Chases and cleans the two most important threads on the AR-15/M16 receivers. 1.250"-18 tpi - Corrects out of spec or cross-threaded upper receivers and barrel nuts. 1-3/16"-16 tpi - Makes receiver extension (recoil buffer) tube and lower receiver... ... more