• Ultra-reliable AR-180 piston operating system
• Compatible with current mil-spec AR-15 lowers
• Machined 7075 T6 aluminum receiver & handguard – hardcoat anodized finish
• 16″ barrel with matte black Nitride finish
• .223 Wylde chamber
• Button rifled bore; 1-8″ twist
• ½”-28 threaded muzzle
• Replica 3-prong AR-180 flash suppressor
• Molded polymer ejection port cover
• Total weight: 4.65 lbs

The 16″ barrel is machined from extra-strong 4150 carbon steel,FFL-near-me with a hard Nitride finish that really resists surface wear. The BRN-180 is chambered in .223 Wylde – for extra flexibility in ammo choice – with 1-8″ rifling, so it handles both .223 Remington and military-type 5.56mm NATO ammo with equal aplomb. Up front there’s a replica of the AR-180’s unusual three-prong flash hider: the hemispherical bottom prong helps prevent the muzzle blast from kicking up a dust signature when shooting prone. Standard ½-28 tpi muzzle threads let you swap on a modern AR-15 muzzle device should you be bitten by the customizing bug.

• Compatible with current mil-spec AR-15 lowers
• Machined 7075 T6 aluminum receiver & handguard – hardcoat anodized finish
• 16″ barrel with matte black Nitride finish
• .223 Wylde chamber
• Button rifled bore; 1-8″ twist
• ½”-28 threaded muzzle
• Replica 3-prong AR-180 flash suppressor
• Molded polymer ejection port cover
• Total weight: 4.65 lbs

BRN-180^® Gen2 Overview

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The new Brownells BRN-180^® and BRN-180S^® Gen2 upper receivers were designed in conjunction with PWS and FM Products to incorporate many improvements AR-15 creator Eugene Stoner made in the AR-18/AR-180 rifles originally introduced in the 1960s. Key features that make the BRN-180® the “revolutionary evolution” of the AR-15 platform include:

• Ultra-reliable, short stroke gas piston operating system
• NO buffer tube! Ideal for a folding stock/brace (see below)
• Can be fired with a folding stock FOLDED!
• Adjustable gas block lets you control gas flow for a sound suppressor
• Rock-solid Picatinny/M-LOK handguard easily detaches by removing ONE screw
• Compatible with any mil-spec AR-15 lower receiver
• Or mate to a dedicated Picatinny-stock ready BRN-180 lower
• AR-180-style 3-prong flash hider really quells the fireball
• Muzzle threads: 1/2″-28 tpi (.223) and 5/8″-24 tpi (300 BLK & 7.62×39)

The BRN-180 and BRN-180S Gen2 upper receivers are available chambered in .223 Wylde (optimized for both .223 Remington and 5.56 NATO ammo), .300 Blackout, and 7.62x39mm. All barrels are button rifled with a 1-8″ twist rate and come in pistol, carbine, and rifle barrel lengths.