NEW Brownells BRN-4 Upper Receiver Kit


Brownells just announced a new HK416-pattern upper receiver kit, the BRN-4. This piston-driven upper is compatible with standard AR-15 lower receiver groups.

Brownells @ TFB:

Heckler & Koch’s HK416 needs little introduction. It has seen service with conventional armies and special operations forces, and was famously used to kill Osama bin Laden. The closest thing to a 416 on the US market is the MR556, but it has some differences that drive the purists crazy. Some may remember that Brownells imported a selection of true HK416 parts a few years ago. Those dried up, but the demand did not.

Enter the BRN-4. It’s compatible with 416 parts and has the classic quad rail as seen on the M-27. Clone nerds who may have some parts for their CAG clone can buy parts separately to complete their build. The BRN-4 upper kit is available with a 14.5″ or 16″ barrel, produced by Faxon. Both options are available as of the time of writing and are currently on sale for $1,499. A 10.4″ barrel is also available but is not sold as part of a kit.

The NEW Brownells BRN-4 Upper, an HK416 For The Masses

The NEW Brownells BRN-4 Upper, an HK416 For The Masses

The NEW Brownells BRN-4 Upper, an HK416 For The Masses

From the manufacturer:


An Affordable Way To Own a Legend!

The HK416 is perhaps most successful adaptation of the AR-5 platform for piston operation. Long coveted by AR-15 collectors, these guns have been scarce and prohibitively expensive in the U.S. Now, folks who want to experience 416 performance first-hand have a truly affordable alternative, thanks to our new HK416-compatible BRN-4 Piston Upper Receiver Kit!

The kit contains all the parts needed to assemble a complete upper, including an original Heckler & Koch® HK416 stripped receiver and handguard. The rest of the HK416-compatible BRN-4 parts are new-manufactured for Brownells: bolt-carrier group with tough Nitride finish, gas piston, operating rod, gas block (and pins), barrel nut, and handguard retaining screw.

You can get your BRN-4 kit with a 14.5″ or 16″ barrel. Manufactured for Brownells by Faxon, the medium-contour, 5.56 NATO chambered BRN-4 barrel is slimmer than original HK416 barrels to keep weight down and help you build a well-balanced rifle.

All images via Brownells

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Daniel Y

AKA @fromtheguncounter on Instagram. Gun nerd, reloader, attorney, and mediocre hunter. Daniel can still be found on occasion behind the counter at a local gun store. When he is not shooting, he enjoys hiking, camping, and rappelling around Utah.

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