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Decided to build an AR9

This is a discussion on Decided to build an AR9 within the Gun Projects forums, part of the Gun Forum category; Originally Posted by Land Cruiser Powermad tell us more about this side folding pistol brace! I too have a home built AR 9mm pistol; using ...


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Old 05-03-2020, 06:42 AM   #16
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Quote:
Originally Posted by Land Cruiser View Post
Powermad tell us more about this side folding pistol brace!

I too have a home built AR 9mm pistol; using a Foxtrot Mikes upper, Aero Precision 5.56 lower, and ENDOmags. Also using a SIG Romeo5 red dot on this AR pistol.

Thanks!
It's just an SBA3 brace and a Law Tactical folder, Gen3 I believe.
As long as the BCG has the pinned slug in the rear you can use the folder.
The Law adapter fit real loose in the PSA BCG and I was looking for different o-rings to try and snug it up but the KVP BCG took care of that problem as it fit much tighter, enough that I had to lube the o-rings with soap to get it in the BCG.
Same thing when I had the folder on my AR15 with a Radian BCG.
Which is how the pistol thing got going.
All it took was that would be really cool on a pistol and sitting in traffic and a pistol was born LOL.
With the folder, carbine tube and SBA3 brace the LOP with it extended is right at 13.5"
When I had it on my AR15 with a Vltor A5 action the LOP was 16.5", which is kinda long even for me and I ran it on position 4.
With just a Carbine action I ran it fully extended.
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Old 05-03-2020, 07:25 AM   #17
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When I was looking at putting a pistol together I had already decided that anything under 8" and I may as well just get an X5.
I didn't like any of the 4" pistols at the LGS which seems to be all the rage now days unless you step up and spend big Bux, which once again, if I'm going to spend that much on a pistol it will have Sig DE and an X on the side of it.

As I found out even with an 8" AR9, the muzzle is a lot closer to my face than with my 365. Not bad but could be better.
I don't see how people run them with a Brake, no thanks.
147gn seemed to be the best for it, really zapped the plate and accurate.
The M1152 was a bit too fast at 25 yds as it put small craters in my 1/2" plate.

I'm all loaded up and once again it's like a cow pizzing on a flat rock outside so I haven't had a chance to try the comp out yet.

And I probably screwed myself again.
Got a CMC PCC trigger inbound.
The BCM enhanced trigger is good, for an AR15 but could be better for a PCC.

At least I don't have as many rifles as pistols.
Because once one got a better trigger I um.. became a trigger snob and it got kind of expensive.
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Old 05-03-2020, 07:25 PM   #18
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Just get a Hiperfire and be done with it.
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Old 05-04-2020, 07:49 AM   #19
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Their PCC one isn't available yet and I got the CMC PCC trigger for a really good price that I couldn't pass up.

I do have my eye on it though as it has some pretty nifty features and a 2lb pull.
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Old 05-04-2020, 03:53 PM   #20
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Quote:
Originally Posted by powermad View Post
Their PCC one isn't available yet and I got the CMC PCC trigger for a really good price that I couldn't pass up.

I do have my eye on it though as it has some pretty nifty features and a 2lb pull.
I use the Hiperfire 'Reflex' model (formerly the 24E IIRC) and it works just fine in PCC's. But the CMC's a nice unit too.
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Old 05-07-2020, 03:38 PM   #21
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Wow, going to take a bit to get used to the CMC trigger.
I thought the 2 stage in my AR10 was touchy. No riding the reset on this, relax a bit and click.
Zero take up and a crisp break.
Will probably be like when I got an SRT and sent rounds down range I didn't intend to at first.
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Old 05-14-2020, 11:06 AM   #22
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Good to hear that the Endomags are working, it seemed that early versions had some issues. I have a CMMG radial-delayed blowback upper system that I use with their version of Endomags and they work great. Hold open and everything.
Added a KVP Linear Comp to make it past 12" (needed for legality in my state as an 'other' firearm). Will be putting together a 16" upper to use with my pre-ban lower as a 'legal PCC, too.
After shooting this quite a bit I wonder if I should have just sucked it up and went that route.
I'm pretty sure mine needs a bit more mass and it's already punchy enough.
Even eats weak 115gn and flings the brass just fine.

The radial delay system looks to be a better setup being able to use a lighter mass to cycle the action.
An Aero assembled upper with their 9" handguard and the CMMG kit is the way I should have went to begin with I think.
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Old 07-28-2020, 05:57 AM   #23
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PCC are fun.
Here is one of my builds. Let me know what you think.

https://www.instagram.com/p/CAObg6UJEeI/

Last edited by danguba; 07-28-2020 at 06:20 AM. Reason: Pic added.
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Old 07-28-2020, 06:03 AM   #24
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After I got my MPX the AR9 just sits now
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