Home / Accessory-Parts / B&T USW-G20 CONVERSION KIT G20/21 View cart “ProMag PROMAG AMBI DUAL SLING PLATE” has been added to your cart. Sale! B&T USW-G20 CONVERSION KIT G20/21$57500 Original price was: $57500.$45707Current price is: $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 AR-15 SS 11.75″ $1795 ProMag AR-15/M16 MAGWELL VICE BLOCK $1599 Christensen Arms THREAD PROTECTOR 5/8-24 BRNZ $3999 Sale! Christensen Arms DBM BOTTOM METAL SA TACTICAL $26999 Original price was: $26999.$23825Current price is: $23825.