Home / Accessory-Silencer Accessories / Gemtech THREAD PROTECTOR 1/2-28 RF You cannot add "SilencerCo 3-LUG MUZZLE DEVICE 9MM 1/2X36" to the cart because the product is out of stock. Gemtech THREAD PROTECTOR 1/2-28 RF$1800 Out of stock SKU: 12222 Category: Accessory-Silencer Accessories Product ID: 26738 Description Description 1/2-28 Thread Protector Related products Sale! Rugged Suppressors OBSIDIAN PISTON 9/16×24 $8000 Original price was: $8000.$7196Current price is: $7196. Sale! Yankee Hill Machine Company SIDEWINDER PISTON 45ACP 16X1LH $7495 Original price was: $7495.$7135Current price is: $7135. SilencerCo DELTA 1/2X28 THREAD SPACER $1900