Black Friday Exclusive: FREE BRN-180M Lower Receiver
For Black Friday, get a FREE Brownells BRN-180M Stripped Lower Receiver with the purchase of a BRN-180 SCNR 10.5" .223 Wylde Complete Upper Receiver. This limited-time combo pairs our compact, piston-operated SCNR upper with the purpose-built BRN-180M lower, giving you two key components of a bufferless BRN-180 build while saving on the lower receiver.
BRN-180 SCNR 10.5" .223 Wylde Complete Upper
The BRN-180 SCNR features a compact 10.5" barrel, self-contained recoil system and short-stroke gas piston operation. Its 3-position adjustable gas system offers Suppressed, Normal and Adverse settings, with gas-system tuning specifically optimized for the 10.5" configuration. The upper includes a complete bolt carrier group, non-reciprocating charging handle and standard A2 flash hider.
FREE BRN-180M Ambidextrous Stripped Lower
Designed specifically for BRN-180 uppers, the BRN-180M lower is precision-machined from 7075-T6 billet aluminum and finished in black hardcoat anodizing. Its integrated M1913 Picatinny rear interface accommodates compatible folding stocks without requiring a traditional buffer tube or separate rail adapter.
The receiver also features ambidextrous bolt and magazine releases, an oversized integral trigger guard and compatibility with standard mil-spec AR-15 lower components.
Combo Highlights
- Black Friday Offer: FREE BRN-180M stripped lower with purchase of the SCNR 10.5" complete upper
- Upper: BRN-180 SCNR 10.5" .223 Wylde with adjustable 3-position gas system
- Lower: BRN-180M ambidextrous 7075-T6 billet receiver
- Stock Interface: Integrated M1913 Picatinny rail for compatible folding stocks
- Platform: Bufferless BRN-180 design with self-contained upper recoil system
Non-Reciprocating Left-Side Charging Handle
The left-side charging handle stays stationary during firing, keeping it clear of the shooter and support hand as the action cycles. Its location also allows the support hand to operate the action while the firing hand remains in position.
Downward-Angled Charging Handle
The streamlined charging handle angles downward for easier access and improved clearance around mounted optics. The shape also provides a more natural grasp when charging the upper or manually locking the bolt to the rear.
Sealed Charging-Handle Channel
A protective rubber gasket seals the charging-handle channel while allowing the handle to move freely. The sealed opening helps keep dirt, dust and debris from entering the receiver and reaching internal components.
Automatic Ejection-Port Cover
The traditional hinged dust cover is replaced by a carrier-mounted ejection-port cover. It opens automatically as the bolt carrier cycles and closes when the action returns to battery. An AR-15-style shell deflector sits behind the ejection port to help manage ejected cases, while the automatic cover helps protect the receiver from external contaminants.
10.5" Tuned 3-Position Adjustable Gas System
Select Suppressed, Normal or Adverse gas settings through the handguard without tools. The gas system is tuned specifically for the 10.5" barrel configuration and has been extensively tested and optimized for reliable suppressed operation with both traditional and flow-through suppressors. The gas block and valve use a Chromium Tungsten Nitride finish to help reduce carbon fouling, while solid handguard material around the vent area helps deflect gas away from a forward support hand.
Retained Recoil & Bolt-Carrier Assembly
A retention system keeps the guide rods, recoil springs and bolt-carrier assembly securely contained when the upper is opened or removed from the lower receiver. Press the release when it is time to remove the assembly for controlled field stripping, cleaning and maintenance.
Additional Reliability, Durability & Mounting Upgrades
The BRN-180 SCNR uses upgraded flat-wire guide-rod springs to help drive the bolt carrier fully into battery as fouling builds. An anti-bounce bolt-carrier design helps prevent the carrier from rebounding after it closes, supporting reliable ignition and cycling. A full-length steel cam path reduces wear between the steel carrier and aluminum receiver during extended use, including suppressed shooting.
A strengthened handguard attachment interface provides a rigid, low-flex foundation for optics, lights, lasers, grips and other accessories. Ambidextrous QD sling sockets use hardened steel inserts for added durability and flexible sling placement. At the muzzle, an added barrel flange provides cleaner muzzle-device fitment without the special adapters required on earlier BRN-180 generations.
Note: The lower receiver is stripped. A lower parts kit, trigger assembly and stock are not included. All applicable firearm and NFA regulations apply.
