“FORTIS MUZZLE BRAKE 556 SS” has been added to your cart. View cart “MAGPUL MOE SL CARB STK MIL-SPEC GRY” has been added to your cart. View cart “YHM .45 PIST TP .578X28 .650 OD BLK” has been added to your cart. View cart HomeClass 3 Firearms, NFA & Destructive DevicesClass 3 Parts & AccessoriesYANKEE HILL MACHINE COMPANY SIDEWINDER PISTON 40SW 9/16X24YANKEE HILL MACHINE COMPANY SIDEWINDER PISTON 40SW 9/16X24$67.25 YANKEE HILL MACHINE COMPANY SIDEWINDER PISTON 40SW 9/16X24 2 in stock YANKEE HILL MACHINE COMPANY SIDEWINDER PISTON 40SW 9/16X24 quantity Buy now Add to WishlistRemove from Wishlist Add to Wishlist SKU: LIP|YHM-3235-24 Category: Class 3 Parts & Accessories Product ID: 79024 Related products Add to WishlistRemove from Wishlist Add to Wishlist ODIN 1/2X28 TO 5/8X24 ADAPTER $27.55 Buy now Add to WishlistRemove from Wishlist Add to Wishlist YHM 22/556 RFL THR PROT 1/2X28 .920 $16.25 Buy now Add to WishlistRemove from Wishlist Add to Wishlist SCO O-RING PACK $11.90 Buy now