Greetings:

Ordered a serrated mainspring housing for a 1911a1 from E-gunparts aka Numrich, and got a strange one.

It fits into a standard ww2 Remington 1911a1. But it doesn't have the retention pin hole for the mainspring, mainspring cap and mainspring pin retainer. And it has a slot milled into the flat side that faces the sear spring.

Any ideas as to what it is? I was thinking either a Systema Colt or maybe the Ballister-Molina's. Can't seem to find any illustrations on the web as to either of those pistols main spring housings

Will attempt to put up pix later on Tinypic.com as battery in digital camera is flat.


R. Brown