Angstadt Arms' 0940 Lower Receiver is machined from 7075-T6 billet aluminum with a matte black hard-coat anodized finish and works with any mil-spec upper receiver. It features a flared magwell, integrated, oversized trigger guard, and a last round bolt hold open. The 0940 Lower Receiver accepts Glock magazines. This model is for 9mm Luger. NOTE: Requires a lower parts kit, buffer & stock of your choosing to complete.