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AR pistol caliber

Old 05-26-2020, 12:05 PM
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Default AR pistol caliber

Im going to buy an AR pistol real soon, but I cannot decide if I should get 9mm, or 5.56.
It will just be a range toy, something for the kid to shoot with me. (I have a full length fixed stock on my current AR, and he cannot mount it properly).
Everything Ive read limits the 9mm to about 100 yards for practical purposes, Im just not to sure Ill shoot past that or not though.
I might start shooting in a few local shooting matches too, 2-gun, or USPSA, and will most likely use the AR pistol at the matches too, regardless of which caliber I buy.
Which caliber do you shoot, or recommend?
Old 05-26-2020, 12:20 PM
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I own 3 AR pistols...2 556 and one 7.62x39... The 7.62x39 is my favorite BUT for just one get a 556 (ammo is cheap and plentiful). I would look at a 10.5 inch pistol, a 7 inch is very small, I worry about hands getting in front of the barrel.... A 10.5 inch gun will reach out 200 yards maybe 250 and still be pretty potent.

The AR pistols are by far the most fun, I own several full sized ARs too..
Old 05-26-2020, 12:22 PM
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Beowulf. Might as well go full Monty.
Old 05-26-2020, 12:24 PM
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I've got a PSA 9mm and have been happy with it, but no last round bolt hold. Have 2 AR rifles in 556, but wanted something a little different. It's a fun gun. Not terribly loud compared to rifle caliber stuff.
Old 05-26-2020, 12:31 PM
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I own several AR pistols; all are chambered in 5.56, 300 BLK, and 9mm. For your first build I'd recommend 5.56. I would not recommend a barrel length shorter than 10.3" for a pistol that is chambered in 5.56. You get better dwell time with longer barrels without compromising size which is why I recommend a 11.5 or 12.5 to most people for an all around, do everything AR pistol build. They are not substantially larger than a 10.5 but the dwell time is significantly better; which is better for reliable cycling
Old 05-26-2020, 12:40 PM
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Originally Posted by kernmw10 View Post
I own several AR pistols; all are chambered in 5.56, 300 BLK, and 9mm. For your first build I'd recommend 5.56. I would not recommend a barrel length shorter than 10.3" for a pistol that is chambered in 5.56. You get better dwell time with longer barrels without compromising size which is why I recommend a 11.5 or 12.5 to most people for an all around, do everything AR pistol build. They are not substantially larger than a 10.5 but the dwell time is significantly better; which is better for reliable cycling
My family owns a total of Five 556 10.5 inch AR pistols, maybe we got lucky but none have any issue cycling, so yes I would agree with you. The 7.62x39, now, that took some minor tinkering to get right but it so fun..lol

I agree, I would not want less than 10.5 barrel in 556..

Old 05-26-2020, 12:47 PM
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I like the 9mm CZ Scorpion. Fun as heck and pretty accurate.
Old 05-26-2020, 12:55 PM
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I have 9mm, 300blk and 5.56 all SBRs. Same as a pistol. I shoot the 300 and 9 all the time. Nothing better than the 300 supressed. So much fun.
Old 05-26-2020, 01:00 PM
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Originally Posted by Flats_Addict View Post
I have 9mm, 300blk and 5.56 all SBRs. Same as a pistol. I shoot the 300 and 9 all the time. Nothing better than the 300 supressed. So much fun.
Damn right. My favorite gun to shoot is a 9" BCM 300 BLK with a SilencerCo Omega9k. When you shoot subs it is dead quiet.
Old 05-26-2020, 01:00 PM
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They are both PSA. The 5.56 pistol kit is $429, and the 9mm is a complete rifle for $650.

I was considering the 9mm just for the cost of ammo, but a little concerned with having such limited range with it.
And the 5.56 is cheaper to buy.

https://palmettostatearmory.com/psa-...istol-kit.html

https://palmettostatearmory.com/psa-...165450152.html


Old 05-26-2020, 01:10 PM
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I have two different PSA 10.5 pistols...family has 2 more, they run great..

My opinion
Spend the little extra and get the SB2 or SB3 bracein the kit simply because both will adjust like a magpul stuff. Very simple to adjust for growing kids or when adults want to shoot it..TRUST ME get the sb2 or 3...The Sb3 is much more sturdier than the sb2 but both work fine..

The blade (I had is ok) is adjustable only by loosening a nut then tightening it, it is a pain to adjust...
Old 05-26-2020, 01:15 PM
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Originally Posted by Cracker View Post
I have two different PSA 10.5 pistols...family has 2 more, they run great..

My opinion
Spend the little extra and get the SB2 or SB3 bracein the kit simply because both will adjust like a magpul stuff. Very simple to adjust for growing kids or when adults want to shoot it..TRUST ME get the sb2 or 3...The Sb3 is much more sturdier than the sb2 but both work fine..

The blade (I had is ok) is adjustable only by loosening a nut then tightening it, it is a pain to adjust...

thanks. For the tip, I appreciate it. 👍🏻
Old 05-26-2020, 01:45 PM
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I have one in 556, 300BO and 9MM, shoot the 9mm the most, its just fun
Old 05-26-2020, 01:45 PM
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Originally Posted by joe.giuliano View Post
I like the 9mm CZ Scorpion. Fun as heck and pretty accurate.
The CZ is an awesome gun to shoot. It was the first pistol caliber carbine that I SBRd. Also pictured is my BCM 9" with the SBPDW brace and my recently acquired PSA AK-V in 9mm.




Old 05-26-2020, 02:10 PM
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Some things to consider

Short barrel rifle calibers without suppressors are loud.

.300 and 9mm suppressed are fun due to the lack noise.

9mm AR's can be finicky (no bolt hold open, etc.)
Old 05-26-2020, 05:24 PM
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There's also pistol available in 5.7 x 28. Ammo prices have gone up but should come back down eventually. I got a killer deal a few years ago on that ammo and loaded up for my FN pistol and PS90.

Old 05-26-2020, 05:32 PM
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Just as an FYI in case you are not aware and as a PSA....
Putting a butt stock like shown on the image in boataholic's post makes the pistol an SBR (Short barrel Rifle) and thus an NFA device. Getting caught by the wrong alphabet agency with one on an AR pistol WILL get you hard time and a guaranteed felony.

Originally Posted by Boataholic View Post
There's also pistol available in 5.7 x 28. Ammo prices have gone up but should come back down eventually. I got a killer deal a few years ago on that ammo and loaded up for my FN pistol and PS90.

http://www.youtube.com/watch?v=NjlDlLkPSO8
Old 05-26-2020, 05:40 PM
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Originally Posted by bakerjw View Post
Just as an FYI in case you are not aware and as a PSA....
Putting a butt stock like shown on the image in boataholic's post makes the pistol an SBR (Short barrel Rifle) and thus an NFA device. Getting caught by the wrong alphabet agency with one on an AR pistol WILL get you hard time and a guaranteed felony.
Looks like a Pistol brace to me and perfectly legal.
Old 05-26-2020, 05:57 PM
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Originally Posted by bakerjw View Post
Just as an FYI in case you are not aware and as a PSA....
Putting a butt stock like shown on the image in boataholic's post makes the pistol an SBR (Short barrel Rifle) and thus an NFA device. Getting caught by the wrong alphabet agency with one on an AR pistol WILL get you hard time and a guaranteed felony.
That is clearly a pistol brace and NOT an SBR..just FYI
Old 05-26-2020, 05:59 PM
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Bad little guns. What kinda range do you guys shoot those things and yall every try to get up in the 300 yard range with them.

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