5903 mag release button stiff

[BruceHT]

I recently acquired a 3rd gen 5903 mfg 1989. The 3 older mags that came with it release easily. The new mec-gar 15 round mags i just bought do not. The button is hard to press. Is that normal for any new mags on this gun or just new mec-gar mags? Will they work in over time or would anyone suggest an extended release button?

Thank you
Bruce

 

[jsbethel]

Jack First has the 745 catch nut in stock if you go for an extended version.

 

[BMCM]

So if I'm reading you right...
Factory mags drop fine but aftermarket mags stick, is that correct?
Do both mags snap in just as easily or do the MecGar mags require more force?
If so, I'd surmise the catch slot on the aftermarket mags is out of spec.

Cheers
Bill