Home / Accessory-Silencer Accessories / Yankee Hill Machine Company QD MOUNT THEAD PROTECTOR View cart “Yankee Hill Machine Company NIELSEN PISTON 9MM M13.5X1LH” has been added to your cart. Yankee Hill Machine Company QD MOUNT THEAD PROTECTOR$1995 In stock Yankee Hill Machine Company QD MOUNT THEAD PROTECTOR quantity Add to cart SKU: YHM-3114 Category: Accessory-Silencer Accessories Product ID: 32647 Description Description Related products Sale! Rugged Suppressors OBSIDIAN FIXED MOUNT .578×28 $8000 Original price was: $8000.$7196Current price is: $7196. Gemtech PISTON GM-45 LID USP $14800 Sale! Rugged Suppressors OBSIDIAN9 3 LUG ADAPT 13.5x1L $8500 Original price was: $8500.$7561Current price is: $7561. Sale! Dead Air Armament GHOST FIXED MOUNT M13.5X1LH $8900 Original price was: $8900.$7865Current price is: $7865.