Bushmaster | BFSIII Built Lower Receiver | XM15-E2S

The Bushmaster BFSIII built lower receiver is a near-complete AR-style lower assembled on a forged 7075 XM15-E2S receiver. It combines mil-spec ergonomics with the BFSIII AR-C1 trigger system and a BFI M4 carbine stock to provide a ready foundation for a component-level build or replacement lower. Intended for range use and competitive or precision-style shooting applications, this lower emphasizes durable materials and user-focused features.

Product Specifications

• The manufacturer is Bushmaster.
• The receiver is a 7075 Forged XM15-E2S lower.
• The stock is a BFI M4 Carbine Stock.
• The grip is an A2 Pistol Grip.
• The trigger guard is a Mil-Spec Trigger Guard.
• The trigger is a BFSIII AR-C1 Trigger with binary functionality where legally permitted.
• The safety selector is a BFSIII AR-C1 Ambidextrous Selector.
• The finish is Matte Black.
• The listed weight is 2 lbs..
• The product condition is New.
• The ATF manufacturer is B.F.I..
• The ATF model is XM15-E2S and the ATF type is Receiver.
• Caliber is Not specified due to conflicting source data.
• Magazine information is Not specified due to conflicting source data.
• UPC: 604206203175.

This lower provides a robust, component-forward platform for shooters who prefer building or upgrading their AR-style rifles. With a forged 7075 receiver, mil-spec features and the BFSIII trigger system, it is well-suited for sustained range sessions and competition-style builds where reliable hardware matters. The included BFI stock and A2 grip make it a practical starting point for a wide range of configurations.