Shop › GRIFFIN PISTON BBL ADAPTER 1/2X28 SP GRIFFIN PISTON BBL ADAPTER 1/2X28 SP $55.00 Griffin Armament Barrel Adapter, CAM-LOK, 1/2X28 Special, For barrels with smaller outside diameter Fits Glock 43/43X/48, Sig P365 PI1228S Quantity: Add To Cart Added! Griffin Armament Barrel Adapter, CAM-LOK, 1/2X28 Special, For barrels with smaller outside diameter Fits Glock 43/43X/48, Sig P365 PI1228S