Quoted:
Which is more reliable?
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Both are equally reliable (I have a colt pattern 9mm for the record)
Colt patter has last round hold open where Glocks can be hit and miss
Glocks have a weird angle depending on the lower
I can't say about Glock lowers but loading a full mag on a closed bolt with a colt mag is a pain in the ass and the base pad will mangle your hand when you try to slap it home
so it depends on what you want to use the gun for
if its for home defense where if you are shooting more than 32 rounds, max for a standard magazine, then maybe Glock if it loads better
BTW if you are dumping 32 round for a home defense problem you are having a big problem
I have a Colt pattern 9mm PCC and I use it for competition
most stages are less than 32 rounds so reloads are rare
its said if you have to reload in a PCC match you are doing something wrong
also mag extensions for Colt Mags are problematic
Mag extensions for Glocks are almost 100% reliable
but that being said I do wish I went for a Glock style lower
No one really uses a Colt style PCC for competition unless like me its one they had for a while or bought at a time they didn't know
and yes I bought the Colt style because the angle on the mag looked better
BTW in competition if you run to the last round hold open you are also doing something wrong
you plan your stage to top off