At the NRAAM in Dallas I had the opportunity to check out the new B&T USW Grip module for the SIG P320. I’m a fan. It felt well-made and looked great. For those of you who haven’t seen it before, basically it’s a polymer grip module with a side-folding stock that accepts SIG P320 frame inserts and parts.
To build the USW Grip Module all you need to do is move the trigger group, the slide and the magazine release onto the USW-320 frame. Pretty easy.
The USW Grip Module is probably going to be a popular SBR choice for From 1 builders. According to the B&T website the USW Grip Module is available as of April 2018, but I have yet to see one in stock anywhere yet.
And before you ask, no it doesn’t take GLOCK mags or an arm brace.