The Griffin MK2 pistol series improves on the features of the MK1 by improving the foundation of the pistol; its lower receiver. The Griffin MK2 fully-ambidextrous lower receiver is manufactured using state-of-the-art aerospace manufacturing techniques to derive sub-Mil-Spec tolerances and unparalleled quality. All control features are mirrored affording full-ambidextrous functionality. The MK2 PSD features a pistol-length gas system; suppressor optimized buffer system; 416R SS barrel; Griffin muzzle device; A3 grip and SBA3 pistol brace.