Home / Accessory-Parts / B&T USW-G20 CONVERSION KIT G20/21 View cart “Wilson Combat LOWER RECEIVER PARTS KIT AR-15” has been added to your cart. Sale! B&T USW-G20 CONVERSION KIT G20/21$57500 $45707 Out of stock SKU: BT-430220 Category: Accessory-Parts Product ID: 26294 Description Description Compatible with Glock 20/21Aimpoint ACRO InterfacePicatinny Rail with Screw Related products Wilson Combat GAS TUBE PISTOL LENGTH 6.6″ $1350 Sale! Christensen Arms DBM BOTTOM METAL SA TACTICAL $26999 $23825 Wilson Combat GRIP MOD WCP365 XL BLK $6495 Wilson Combat GRIP MOD WCP320 CARRY BLK $6795