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BRN-180S™ GEN2 .300 BLK

10" Barrel

Brownells BRN-180 GEN2 Upper in 300 Blackout

BRN-180S™ GEN2

10.5" Barrel

Brownells BRN-180 GEN2 Short Barrel Upper

BRN-180™ GEN2 16"

16" Barrel

Brownells BRN-180 GEN2 Upper

BRN-180™ GEN2 18.5"

18.5" Barrel

Brownells BRN-180 GEN2 18.5" Upper

BRN-180™/BRN-180S™ Gen2 Overview

The new Brownells BRN-180™ and BRN-180S™, designed in conjunction with PWS and FM Products, incorporate many of the improvements found in the AR-18/AR-180 rifles originally introduced in the 1960s, including a robust, reliable gas piston operating system. Key features include:

  • Adjustable Gas System now on ALL models
  • Simplified, more secure Gen2 handguard attachment system (see below)
  • Ultra-reliable Short Stroke type piston operating system
  • Ideal for folding stock/brace (see below)
  • Compatible with ANY current mil-spec AR-15 lower
  • Machined 7075 T6 aluminum receiver & handguard with hardcoat anodized finish
  • Barrels of extra-strong 4150 carbon steel with a tough, matte black Nitride finish
  • Button rifled bore with 1-8" twist
  • Replica three-prong AR-180-style flash suppressor
  • 1/2"-28 tpi threaded muzzle (5/8"-24 tpi .300 Blk)
  • Molded polymer ejection port cover

All Gen2 BRN-180™ and BRN-180S™ upper receivers are fully compatible with any standard, mil-spec AR-15 lower receiver. Add one to your collection today!

BRN-180S™ 300 BLK Upper On A BRN-180™ Forged Lower.

Common Features:

Action Type:

Gas Piston

Gasblock:

Adjustable

Twist Rate:

1:8

Finish:

Anodized Black

Muzzle:

3 Prong Flash Hider

BRN-180S™ 300 BLK Specifics:

Chambered:

.300 Blackout

Barrel Length:

10 inch

Length:

18.57 inches

Weight:

4 lbs 10 oz

BRN-180S™ Specifics:

Chambered:

.223 Wylde

Barrel Length:

10.5 inch

Length:

18.7 inches

Weight:

3 lbs 15 oz

BRN-180™ 16" Specifics:

Chambered:

.223 Wylde

Barrel Length:

16 inch

Length:

24.57 inches

Weight:

4 lbs 10 oz

BRN-180™ 18.5" Specifics:

Chambered:

.223 Wylde

Barrel Length:

18.5 inches

Length:

24.57 inches

Weight:

4 lbs 13 oz

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BRN-180™/BRN-180S™ Gen2 Details

BRN-180 On Folding Stock Lower BRN-180 On No Buffer Lower BRN-180 On BRN-4 Lower BRN-180 On Fixed Rifle Length Lower

Fits Mil-Spec AR-15 Lowers: The BRN-180™/BRN-180S™ is a complete, plug-and-play upper assembly that drops onto any standard mil-spec AR-15 lower.

BRN-180 GEN2 Gas System

Short-Stroke Gas Piston: Designed for maximum reliability, the short-stroke gas piston keeps fouling out of the receiver and helps the bolt run cool and clean. The entire piston system is contained within the receiver, so the BRN-180/-180S does NOT require the standard AR-15 recoil buffer, spring, and receiver extension.

BRN-180 GEN2 Flash Hider

Flash Hider: The 3-prong flash hider has the authentic look of the original AR-180, while also effectively reducing both muzzle flash and rise. The closed bottom reduces the amount of dirt and debris kicked up by the muzzle blast.

Adjustable Gas Block: ALL Gen2 BRN-180™ models now have an adjustable gas block that enables you to easily dial in the correct amount of gas flow for suppressed OR unsuppressed shooting.

BRN-180 GEN2 Hand Guard Set Screw

Simple Yet Rock-Solid Handguard Attachment: The Gen2 handguard is now retained by a single, large setscrew, a big improvement over the over the original BRN-180 uppers. Remove it with a hex wrench, and the whole handguard comes off. Once the 'guard is removed, you have access to the gas system without removing any internal components. This new system offers more than ample locking force to keep the handguard securely anchored.

BRN-180 GEN2 Carrier

Bolt Carrier & Recoil Guide Rods: True to the original, the bolt carrier rides on twin recoil guide rods for a smooth, light recoil impulse. The recoil system is completely self-contained in the upper.

BRN-180 GEN2 Bolt Detail

Bolt: The BRN-180™ bolt features a tough black oxide finish for easy cleaning and corrosion resistance. It's a classic multi-lug rotating bolt that ensures reliability and secure lockup.

BRN-180 On Folded AR-15

Folding Stock or Folding Brace? Your Choice! Because the BRN-180's recoil assembly is contained ENTIRELY in the upper, there is no need for the AR-15's recoil buffer, spring, and buffer tube (you'll still need the tube for mounting a stock - unless you get one of our BRN-180™ lowers). A BRN-180/-180S rifle/pistol readily accepts folding stocks and braces. And you can fire the gun with the stock/brace FOLDED!

BRN-180™/BRN-180S™ Gen2 Aditional Images

BRN-180 Gen2 Angled Forward BRN-180 Gen2 Angled Back BRN-180 Gen2 Right Side BRN-180 Gen2 Left Side BRN-180 Gen2 Under Side BRN-180 Gen2 Flash Hider BRN-180 Gen2 Disassembled BRN-180S Gen2 Angled Forward BRN-180S Gen2 Angled Back BRN-180S Gen2 Right Side BRN-180S Gen2 Left Side BRN-180S Gen2 Under Side BRN-180S Gen2 Flash Hider BRN-180S Gen2 Disassembled BRN-180 Gen2 300 Blackout Angled Forward BRN-180 Gen2 300 Blackout Angled Back BRN-180 Gen2 300 Blackout Right Side BRN-180 Gen2 300 Blackout Left Side BRN-180 Gen2 300 Blackout Under Side BRN-180 Gen2 300 Blackout Flash Hider BRN-180 Gen2 300 Blackout Disassembled Dust Cover & Charging Handle Bolt Carrier Group Bolt Carrier Group Back Side Bolt Back Bolt Front Bolt And Rails

Click Image Above To Open Expanded View

BRN-180 Gen2 Angled Forward
BRN-180 Gen2 Angled Back
BRN-180 Gen2 Right Side
BRN-180 Gen2 Left Side
BRN-180 Gen2 Under Side
BRN-180 Gen2 Flash Hider
BRN-180 Gen2 Disassembled
BRN-180S Gen2 Angled Forward
BRN-180S Gen2 Angled Back
BRN-180S Gen2 Right Side
BRN-180S Gen2 Left Side
BRN-180S Gen2 Under Side
BRN-180S Gen2 Flash Hider
BRN-180S Gen2 Disassembled
BRN-180 Gen2 300 Blackout Angled Forward
BRN-180 Gen2 300 Blackout Angled Back
BRN-180 Gen2 300 Blackout Right Side
BRN-180 Gen2 300 Blackout Left Side
BRN-180 Gen2 300 Blackout Under Side
BRN-180 Gen2 300 Blackout Flash Hider
BRN-180 Gen2 300 Blackout Disassembled
Dust Cover & Charging Handle
Bolt Carrier Group
Bolt Carrier Group Back Side
Bolt Back
Bolt Front
Bolt And Rails
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BRN-180

BRN-180M

The Perfect "Other Half" for Your BRN-180™

Make your new rifle pure BRN-180™ from top to bottom! The BRN-180™ and BRN-180M™ Lower Receivers are designed to take full advantage of the BRN-180™ upper's self-contained recoil system. We offer two models: a Forged lower with external contours similar to the original AR-180; and the extra-strong machined Billet BRN-180M™ lower with a more angular, modern profile. Both feature an integral Picatinny rail at the rear for easy attachment of a folding stock or pistol brace.

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