USW-320 Black

The revolutionary USW concept from B&T is now also available for the P320 and M17 from SIG SAUER. The practical polymer conversion kit transforms a normal P320 or M17 (full-size or compact) in less than two minutes into a USW-320 with integrated stock. Just transfer the trigger group, the slide and the magazine release onto the USW-320 or M17 frame. The USW-320 and USW-M17 lowers equal the full-size P320 and M17 lowers, so 17 round magazines (and bigger) can be used.

USW-320 Black | BT-430174

USW-M17 Black | BT-430210-US


Extends Effective Range

Adds 3oz. to the Weight of the Host Handgun

Carry Model Sized Module

Tool-less installation Accepts SIG Sauer P320 FCU and Slide Assembly

Spring-Assisted Folding Stock


  • Caliber: 9 x 19 mm
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