[jfruser]

i have used both Choate & Scattergun Tech/Wilson Combat extensions. Also Nordic components bbl/mag tube clamps.

Choate is quality & serviceable. The kit I bought had everything: mag ext, clamp, spring, follower. Not too pretty, though.

ST/WC mag ext is both quality & serviceable, but also a wonderfully beautiful bit of work. My only gripe is that the kit lacked a mag/bbl clamp.

Nordic is like ST/WC: just beautiful & stout.