Newbie needs advice on a PCC 9mm

[RevolverRob]

Any advice on gaming uppers for a Colt-mag-based 9mm AR lower? My current upper is effectively integrally suppressed which I understand they won’t let me use.

JP GMR-15 Upper. If I was going to do another one, this is what I would do, with the JP silent capture 9mm buffer assembly.

[LittleLebowski]

I think the Evo works well if you leave it basically stock with standard capacity magazines. In USPSA, the higher capacity mags seems to have fleas, and a number of folks have had trouble trying to work the triggers and perform other customization.

I like the trigger just fine as is, but trigger snobbery does not afflict me

[Grey]

I like the trigger just fine as is, but trigger snobbery does not afflict me

Might get you kilt in the streets if you don't have a 6 oz trigger for them sweet mozambique quadruple navy seal delta taps.

[ranger]

I think that's mainly due to shot timers having a tough time with picking up shots from suppressed guns. Hard to give you a legitimate score that way.

That is what I ran into with my suppressed SBR - shot timer missed many of the suppressed shots.

[underhook]

The purpose would be fun, potentially have something to compete with,

I own a Kriss Vector, MPX, and Scorpion Evo 3 all in 9mm. They are all a tone a fun to shoot and I compete in local PCC matches with them.

The MPX is the most easily concealed and carried in a back pack. I added a Timney trigger as the stock is not so great. Magazines are great quality (I think Lancer makes them) but expensive. The rails is great and I found it easy to setup with small light. The manual of arms carries right over from the AR.

The Scorpion is Glock simple. A little rougher to shoot thanks to the massive unstoppable bolt. It's form factor is much larger than the MPX.

The Kriss is Glock mag compatible and real smooth easy to shoot gun. Stock trigger is good. I added a SB Tactical brace. I've had FTEs problems with it with 115 ammo. 147 runs great. The ejection port in tinny so when you get FTEs it's a pain.

All three work great with a Silencer Omega 9k.

[ranger]

I need to try that Timney trigger for the MPX. I have been very lucky and caught MPX Gen 1 mags on sale much cheaper than the normal retail - I grab MPX mags whenever I see them on sale. I have added some 20 round mags for "reloads" and when the MPX is in a backpack or such where the 30 rd mags are problematic.

[Dismas316]

I need to try that Timney trigger for the MPX. I have been very lucky and caught MPX Gen 1 mags on sale much cheaper than the normal retail - I grab MPX mags whenever I see them on sale. I have added some 20 round mags for "reloads" and when the MPX is in a backpack or such where the 30 rd mags are problematic.

Can you use the gen 1 mags for the gen 2 mpx?

[ranger]

Can you use the gen 1 mags for the gen 2 mpx?

They have been working fine in my Gen 2 MPX 9mm.

[Sensei]

In order of reliability and shear fun, I recommend the following:

Z5P or Z5RS. Built on HK licensed machinery by HK trained techs, they’re about as close as you can come to a German MP5 without getting an SP5K


Sig MPX Gen 2. Has been reliable both suppressed and unsuppessed for about 1000 rounds without cleaning


Scorpion Evo 3. Needs about $400 of aftermarket parts to bring it into compliance and up to speed with the MPX, IMHO


I also have a KRISS Vector with brace. While it is more of a novelty gun, mine has been reliable and it does feed from Glock mags.

[Dismas316]

Everything I am seeing on the Gen 2 MCX is in the $1999 range, if even available, seems they are the one to get in terms of reliability vs. the gen 1. Might have to bit the bullet on this one. Seems to check all the boxes, and the modularity is certainly a plus.