Home / Accessory-Silencer Accessories / Yankee Hill Machine Company NIELSEN PISTON 9MM M13.5X1LH You cannot add "SIG SAUER FLASH HIDER CL 5.56MM 90 DEG" to the cart because the product is out of stock. Sale! Yankee Hill Machine Company NIELSEN PISTON 9MM M13.5X1LH$7495 Original price was: $7495.$7135Current price is: $7135. Only 1 left in stock Yankee Hill Machine Company NIELSEN PISTON 9MM M13.5X1LH quantity Add to cart SKU: YHM-2060-M Category: Accessory-Silencer Accessories Product ID: 26183 Description Description 9mm Piston For R9 & N2ONot For Sidewinder Suppressors Related products SilencerCo O-RING BOOSTER PACK $900 Sale! Gemtech ADAPTER GSG-1911 M9X.75-1/2-28 $4500 Original price was: $4500.$4183Current price is: $4183. Dead Air Armament SIG MOSQUITO THRD ADAPT 1/2X28 $4500 Sale! Yankee Hill Machine Company SIDEWINDER PISTON 40SW 9/16X24 $7495 Original price was: $7495.$7135Current price is: $7135.