Drop - In Mainspring Housing

Flawlessly machined! Perfect fit, looks great on my pistol!

I got one of these 25lpi for a Springfield build out used a SC SI Magwell instead. Finish and fit are great as always I am going to use it on a Colt 5" instead. I only use SC for all my MSHs, magwells and safeties. I really like how the paddle fits the plate.and my thumb

I am so glad these are available from Chen customs. They are a great addition to my pistol, and I can get rid of the composite housing. I am impressed with the precise machining and finish.

Tight fit. Looks like a professional gunsmith install on a drop in part. Functions perfect. Just a great part.

I've used several Chen Custom parts over the years and the quality has always been top-tier. This MSH was no different-- the machining, checkering and finishing were all perfectly executed. The part was a drop-in fit on a Caspian frame. Buy with confidence.

Didn't expect the drop in to trult mean drop in. Made me very happy to not do addtional work and the result is clean. For sure gonna buy again.

First ordered a replacement mainspring housing from a very high end competitor [begins w/ a "W"] for my Kimber Stainless Pro TLE II in Commander. Absolutely could not get it to fit. Ordered a Chen, the fit was perfect and matched the gun beautifully. Am more than impressed!