B&T USW-G20 | BT-430220 | Glock 20/21 Conversion Kit

The B&T USW-G20 conversion kit (BT-430220) adapts compatible Glock pistols with a standard accessory rail to a folding QD stock chassis while retaining the ability to be used in the pistol configuration. It fits Glock models that use standard rails (Gen. 3–5) and is offered in a black finish. The design provides a Picatinny rail and an Aimpoint ACRO interface to support common sighting options, with the original open sights available as backup where applicable.

Product Specifications

• The manufacturer is B&T.
• The manufacturer part number is BT-430220.
• The model designation is G20.
• The kit is compatible with Glock 40/20/21 models that have a standard rail (Gen. 3–5).
• The supported calibers are 10 mm Auto and .45.
• The finish is Black.
• The kit includes an Aimpoint ACRO interface.
• The rail provided is a Picatinny rail with screw.
• The grip/stock type is a QD folding stock.
• Adjustable objective is listed as False.
• Drilled and tapped is listed as False.
• Illuminated reticle is listed as False.
• Scope cover included is listed as False.
• The product weight is 1.2.
• UPC is 840225705256.

This conversion kit is intended for shooters who want a compact folding-stock option for range training and for competition/practical shooting platforms that accept Glock pistols with standard rails. The QD folding stock and Picatinny interface add modularity without permanently altering the host pistol, and the Aimpoint ACRO interface supports many micro red-dot footprints where compatible.

The USW-G20 BT-430220 is a straightforward parts-level upgrade that prioritizes modularity and flexibility for qualified users. Its folding QD stock and accessory rail make it a practical choice for organized range sessions and competitive formats where improved stability and sighting options are desired.