Bingham PP 550 .22LR Caliber Semi Automatic Rifle. A rare .22 caliber clone of the military issue PP 50 effectionately known as the "burp gun". Features include a drum fed magazine or stick, carbine stock, fixed sights and heat shield. Excellent rifle for the military enthusiast and collector or weekend target shooter. Available for online purchase now. Condition: 90% - Used no box. Inventory#: 724.