Bushmaster XM15 E2S AR-15 Lower Receiver - Stripped Lower

The Bushmaster XM15-E2S stripped lower receiver provides a versatile foundation for an AR-15 build in any compatible chambering. Forged from 7075 aluminum and marked 'Multi' for caliber flexibility, it delivers a durable platform finished with a Type III hard coat anodize and threaded for a 1/4x28 tension screw for a tight upper-to-lower fit.

Features:

• Multi-caliber marking
• Safe/Semi/Burst safety selector markings
• Threaded for 1/4x28 receiver tension adjustment screw
• Forged 7075 aluminum construction
• Type III hard coat anodize finish

The 'Multi' caliber marking keeps the lower unrestricted to any single AR-15-compatible chambering, a practical choice for builders who intend to swap upper receivers across calibers or want maximum resale and configuration flexibility. The Type III hard coat anodize delivers greater surface hardness and corrosion resistance than standard Type II anodize, and the integrated 1/4x28 tension screw threading allows the builder to reduce or eliminate play between the upper and lower receiver without aftermarket hardware, for a tighter, more consistent fit across upper receivers of varying tolerance.

Bushmaster is an American rifle manufacturer known for producing a wide range of AR-15-pattern rifles and components built to mil-spec standards for civilian, law enforcement, and commercial markets.