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BRN-180M STRIPPED LOWER RECEIVER BLACK AMBIDEXTROUS

BRN-180M STRIPPED LOWER RECEIVER BLACK AMBIDEXTROUS Reviews & Ratings

The Brownells BRN-180M Stripped Lower Receiver is purpose-built for BRN-180 upper receivers, combining an integrated M1913 Picatinny folding-stock interface, ambidextrous controls, and compatibility with standard mil-spec AR-15 lower receiver components.

Precision-machined from 7075-T6 aluminum billet with a durable black hardcoat anodized finish, the BRN-180M takes full advantage of the BRN-180 platform's self-contained recoil system. The result is a streamlined receiver designed specifically for bufferless, folding-stock configurations without sacrificing the familiarity of standard AR-15 lower components.

Integrated M1913 Picatinny Folding-Stock Interface

Unlike a conventional AR-15, the BRN-180 uses a self-contained recoil system housed entirely within the upper receiver. Because the action does not require a buffer tube extending behind the lower, there is no need for traditional receiver extension hardware.

The BRN-180M takes advantage of this design by replacing conventional buffer tube threads with an integral M1913 Picatinny rail machined directly into the rear of the receiver. This provides a clean, rigid mounting interface for compatible folding stocks without requiring a separate Picatinny adapter.

Ambidextrous Bolt & Magazine Releases

The BRN-180M features ambidextrous bolt and magazine releases, allowing these controls to be operated from either side of the receiver. The proprietary ambidextrous bolt-release and magazine-release lever hardware is included.

The ambidextrous magazine-release lever is designed to work in conjunction with a standard mil-spec magazine catch, retaining compatibility with familiar AR-15 components.

Precision-Machined 7075-T6 Billet Construction

Machined from 7075-T6 aluminum billet, the BRN-180M features a durable hardcoat anodized finish and several integrated features designed to simplify the receiver configuration.

An oversized integral trigger guard eliminates the need for a separate trigger guard. Additional features include a threaded bolt-catch pin, captive set screw for the takedown-pin detent spring, and a receiver tensioning screw for the upper receiver takedown lug.

BRN-180M Features & Specifications

  • Material: Billet 7075-T6 Aluminum
  • Finish: Black Hardcoat Anodized
  • Designed for BRN-180 Upper Receivers
  • Integrated M1913 Picatinny Rear Stock Interface
  • No Traditional Buffer Tube or Receiver Extension Required
  • Ambidextrous Bolt-Release Controls
  • Ambidextrous Magazine-Release Controls
  • Compatible with Standard Mil-Spec AR-15 Lower Components
  • Integral Oversized Trigger Guard
  • Flared Magazine Well
  • Threaded Bolt-Catch Pin
  • Captive Takedown-Pin Detent Screw
  • Receiver Tensioning Screw

Compatibility & Included Components

Upper Receiver Compatibility: The BRN-180M is specifically designed for BRN-180 upper receivers, including compatible SCNR models. Due to its proprietary design, it is not compatible with standard AR-15 upper receivers.

Lower Parts Compatibility: The receiver is designed to accept standard mil-spec AR-15 lower components, including triggers and conventional fire-control parts. The primary exception is traditional buffer tube and receiver extension hardware, which is replaced by the integrated M1913 stock interface.

Included Hardware: The stripped receiver includes proprietary ambidextrous bolt-release and magazine-release lever hardware, along with the specified receiver-specific pins and screws.

Please Note: This is a stripped lower receiver, not a complete lower assembly. Trigger group, remaining lower parts, and stock are sold separately. The receiver requires transfer through a Federal Firearms License (FFL) holder.

You must be 18 years of age or older to purchase rifles and shotguns, and 21 or older to purchase handguns, receivers, frames, and suppressors. Minimum age requirements may vary by state. Check your state and local laws before ordering. It is your responsibility to fully understand the laws in your area and to ensure that possession of this item would not violate any applicable state or local laws. This product must be delivered to a Federal Firearms License holder.

See all of our AR15s and AR15 parts here.

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Reviews Summary
Overall, reviewers have mixed feelings about the BRN-180M Stripped Lower Receiver. While many appreciate the build quality and unique features, notable frustrations arise from the lack of included parts and the design limitations of the ambidextrous features. Some users find the bolt catch design awkward, impacting overall usability.
What Reviewers Are Saying
Build Quality
67%
Many reviewers praise the fit and finish of the BRN-180M lower receiver, noting its high-quality construction. The aesthetics of the receiver are also positively highlighted, with several users expressing satisfaction with its overall look and feel.
Design Limitations
67%
A number of reviewers express frustration with the ambidextrous design, specifically the lack of a right-side bolt catch. This feature is deemed essential by several users, who find the current design does not effectively meet the needs of left-handed operation, diminishing its intended utility.
Missing Parts
50%
Several reviewers mention disappointment due to the absence of necessary components like the screw pin that is supposed to accompany the unit. This oversight has led to usability issues and delays in fully assembling the lower receiver, causing additional frustration for buyers.
5
Completes my BRN180 Upper
This is a high-quality lower receiver meant to compliment the BRN180 upper. The fit and finish are excellent. Assembly was easy and quick. I am very happy with this receiver and I like the ambidextrous controls.
5
Awesome match for the Gen3 upper!
Other than not having the ability to lock the bolt back from the right side, I can't fine anything I don't live about this receiver. I didn't think ambi lowers were really necessary being a right handed shooter but I love the natural, intuitive position of the left-side mag release. All the holes are tight, which is good, and the stainless detent screws will be fine with a bit of added loctite.
Would you recommend this? Yes, I would recommend to a friend