Using a Sproingfield Armory Milspec frame. Not a single hitch at all.
Owned a Wilson Combat stamped Ciener kit with aluminum (heavier) magazines. Not a single problem EVER.
Currently own a Kimber stamped Ciener kit and it comes with the resin magazines. Even bought 3 more from TSE one of our board sponsors ! Life is great with the Kimber / Ciener kit.
Enjoy !!