Brownells194199647
Brownells Brn-180S Gen 2 Upper Receiver 223 Wylde 10.5'' Barrel Black$824.99
Availability: In Stock
Current Stock: Out of stock
The Brownells BRN-180 Gen 2 Upper Receiver in .223 Wylde with a 16" barrel combines modern reliability with proven historical design. Built in collaboration with PWS and FM Products, this upper draws inspiration from the AR-180 platform of the 1960s—a design that introduced the short-stroke gas piston system long before it became commonplace in today's rifles. The Gen 2 refinements make it a serious choice for shooters who want piston-driven performance that pairs seamlessly with any standard mil-spec AR-15 lower receiver.
The heart of this upper is its adjustable gas piston system, a feature now standard across all BRN-180 Gen 2 uppers. You get two selectable settings to dial in function based on your ammunition and conditions, eliminating the need to swap gas cups. The 16" barrel is forged from 4150 carbon steel and finished with a hard Nitride coating that shrugs off surface wear—important for a rifle that'll see real use. The .223 Wylde chamber with 1-8" twist rifling cycles both .223 Remington and 5.56mm NATO ammunition reliably, giving you flexibility at the ammo counter.
The redesigned handguard retention system uses a single large locking screw for solid, consistent lockup. Unlike the original BRN-180, you can now remove the handguard to service the gas system without tearing down internal components—a practical improvement for field work and maintenance. The bolt carrier rides on a pair of guide rods and is buffered by a molded polymer rear piece with a steel insert, keeping everything smooth and durable. The replica three-prong flash hider nods to the AR-180's heritage while that hemispherical bottom prong genuinely helps suppress dust signature when shooting prone. Standard ½-28 threads mean you can swap in whatever muzzle device suits your setup.
Whether you're building a reliable patrol rifle, a competition platform, or simply want to own a piece of AR heritage that actually functions, the BRN-180 Gen 2 upper delivers without compromise.
| Caliber | .223 Wylde |
| Barrel Length | 16" |
| Barrel Material | 4150 carbon steel, Nitride finish |
| Rifling Twist | 1-8" |
| Receiver Material | 7075 T6 aluminum, hardcoat anodized |
| Gas System | Adjustable short-stroke piston with dual settings |
| Bolt Carrier | Dual guide rod system with molded polymer buffer and steel insert |
| Muzzle Threads | ½-28 TPI |
| Flash Hider | Replica three-prong AR-180 design |
| Handguard Retention | Single large locking screw |
| Weight | 4.65 lbs |
| Compatibility | Mil-spec AR-15 lower receivers |
| Finish | Matte black |
Yes. The BRN-180 Gen 2 upper is fully compatible with any standard mil-spec AR-15 lower receiver, making it a drop-in upgrade if you already have a lower on hand.
The .223 Wylde chamber is designed to reliably cycle both .223 Remington and military-spec 5.56mm NATO ammunition with equal performance, giving you flexibility in your ammo selection.
Yes. The Gen 2 handguard uses a single large locking screw for retention, and it can be removed without disassembling internal components. This design makes it easier to access and service the gas system when needed.
The BRN-180 Gen 2 includes an adjustable gas piston system with two selectable settings. You can choose between them depending on your ammunition type and shooting conditions to ensure smooth, consistent function without having to swap gas piston cups.
SKU: 194199661 • Weight: 4.7oz