Home / Accessory-Silencer Accessories / Gemtech SHIM SET 556MM 1/2-28 View cart “Dead Air Armament HUB DIRECT THRD MNT M18X1.5 AI” has been added to your cart. Gemtech SHIM SET 556MM 1/2-28$700 In stock Gemtech SHIM SET 556MM 1/2-28 quantity Add to cart SKU: 3013332 Category: Accessory-Silencer Accessories Product ID: 61326 Description Description 1/2-28Fits 5.56mm Rifles Related products Sale! Yankee Hill Machine Company SIDEWINDER PISTON 40SW 9/16X24 $7495 $7135 Gemtech THREAD PROTECTOR 1/2-28 RF $1800 SilencerCo DELTA 1/2X28 THREAD SPACER $1900 Sale! Gemtech ADAPTER GSG-1911 M9X.75-1/2-28 $4500 $4183