Z4053428

I did, but no response from them yet.

If replace the followers with grams kit, which one should I get? FKS-13 or FKS9-13?? I have both 155mm and 170mm tubes nd using 9mm.

Dry fire and for match as well. I haven’t try them with live rounds yet, so thinking that will give me problem after I fire last round in chamber. so replace them with grams follower kit will solve the problem?

Hi guys, I got few new MBX 2011 competition mags (155mm and 170mm) but and having issue with 4 out of 6 of them. I can't rack my slide open with empty mags. I've try to fully load the mags and let them sit for a week to "break in" the mag spring, but still no luck. These are brand new mags with MBX springs and followers, and only happen to 4 of them. Any suggestion? TIA