Home / Accessory-Silencer Accessories / Rugged Suppressors OBSIDIAN PISTON .578X28 View cart “Dead Air Armament SANDMAN 5.56 FRONT CAP” has been added to your cart. Sale! Rugged Suppressors OBSIDIAN PISTON .578X28$8000 Original price was: $8000.$7196Current price is: $7196. Out of stock SKU: OP001 Category: Accessory-Silencer Accessories Product ID: 30006 Description Description 17-4 Stainless Steel Related products Gemtech THREAD PROTECTOR 1/2-28 RF $1800 Sale! Dead Air Armament HUB DIRECT THRD MNT M18X1.5 AI $8900 Original price was: $8900.$8351Current price is: $8351. Sale! Dead Air Armament WOLVERINE INSERT 24MM RH LONG $8900 Original price was: $8900.$7865Current price is: $7865. Sale! Dead Air Armament GHOST FIXED MOUNT M13.5X1LH $8900 Original price was: $8900.$7865Current price is: $7865.