Home / Accessory-Silencer Accessories / Gemtech SHIM SET 556MM 1/2-28 View cart “Yankee Hill Machine Company SIDEWINDER PISTON 45ACP 16X1LH” 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 Gemtech THREAD PROTECTOR 1/2-28 RF $1800 Sale! SilencerCo BRAVO ANCHOR BRAKE 458CAL BLK $9400 Original price was: $9400.$8606Current price is: $8606. Gemtech ADAPTER MM9 FTM 1/2-28 $7500 Sale! Dead Air Armament SANDMAN 5.56 FRONT CAP $6900 Original price was: $6900.$6042Current price is: $6042.