https://shop.misterguns.com/section/5712/shimsmonthly 0.2 https://shop.misterguns.com/product/6063/rugged-suppressors-shim-kit-1-2x28-sa001daily0.9 https://shop.misterguns.com/product/6070/rugged-suppressors-shim-kit-5-8x24-sa002daily0.9