Semi-auto MOD4SA lower receiver. Our lower receivers feature Mil-Spec, .250 diameter take-down pins and .154 diameter fire control pins. The forged aircraft grade 7075 T6 aluminum lower is hard coat anodized to Mil-Spec, it is also Teflon coated for added durability and color consistency. All internals are semi-auto, Mil-Spec. Receivers are RDIAS/RLL compatible. This receiver comes with all of the lower parts, front take-down pin, fire control group, semi-auto selector, trigger guard, pistol grip and magazine catch/release installed. The rear take-down pin will need to be installed with your complete rifle or carbine buttstock.
