ZM4 Lower Receiver

Precision Forging From High-Strength Alloy For Custom Builds

Stripped, small-pin semi-auto lower receiver is precision machined from an aluminum alloy forging to the same dimensions as USGI receivers to ensure proper fit of components and accessories designed for mil-spec receivers. An affordable platform for any type of custom gun you want to build—from a fast-handling tactical carbine to a match-grade competition rifle. Simply add the upper, fire control components, buttstock assembly, and pistol grip of your choice. Extra hard 7075 T6 alloy gives superior strength and stands up to the battering of thousands of firing cycles; hardcoat anodized surface resists wear and actually adds strength, while providing excellent corrosion resistance. Matte black finish matches most factory upper and barrel finishes. Holes, inletting, and pin locations have already been cut to final dimensions. .154" hammer and trigger pin holes accept the most readily available fire control components, with standard .250" pivot and takedown pin holes.