Home / Accessory-Parts / B&T USW-G20 CONVERSION KIT G20/21 View cart “POF USA DICTATOR GAS BLOCK MIDLENGTH” 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 ProMag PROMAG VERTICAL FORE GRIP BLK $1699 Wilson Combat LOWER RECEIVER PARTS KIT AR-15 $4995 Wilson Combat GAS TUBE AR-15 SS 9.75″ $1395 POF USA TOMAHAWK CHARGING HANDLE 308 $10400