Author Topic: I built a 9mm AR Carbine.  (Read 1761 times)

my_old_glock

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I built a 9mm AR Carbine.
« on: May 01, 2016, 05:26:59 PM »

I built a 9mm AR carbine recently from various parts available on the internet. I originally didn't want to spend over $600 total. So far I have $850 without sights. Add an extra $250 for a Busnell 1-4x24 TDL scope and good 30mm mount, and I am almost at twice the cost I wanted to pay.

My impression of the 9mm AR Carbine: If I were to do it again, I would not waste my time and money on an 9mm AR Carbine. Mine constantly jams. Sometimes the magazine drops out after every shot; both the ProMag and ASC magazines. The velocity for a 125 grain FMJ is about 1450 fps. That is about the same as a 357SIG round from my 6" G20 conversion barrel

On the positive side, when it works, it is extremely fun to shoot. With light loads it sounds almost like a silenced 22LR: No ear protection required. It is accurate and cheap to shoot.

A friend of mine has a PSA 9mm carbine that works flawlessly.






« Last Edit: May 02, 2016, 09:09:08 AM by my_old_glock »

screwedby

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Re: I built a 9mm AR Carbine.
« Reply #1 on: May 03, 2016, 02:58:39 AM »
In my best whiney voice, "But, I want oneeeee."

I have several AR'S in various calibers and since I keep a good stock of 9mm ammo on hand (GSSF) it sorta makes sense, for a defense gun around the farm.

My wife would probably shoot all my ammo up.

I was wondering about the cost, in the end
That is more than I expected as well.

And if you trouble shoot and try to repair, the cost goes up even more.

I had a few problems with 300 blk.  Everyone is an expert and had different suggestions but I worked through them.

I suspect there are a lot of guns out there with problems....

screwedbygoogle
original username modified by google
« Last Edit: May 03, 2016, 03:00:20 AM by screwedby »

sqlbullet

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Re: I built a 9mm AR Carbine.
« Reply #2 on: May 03, 2016, 06:53:29 AM »
My blackout has a limited number of rounds through it so far.  Couple hundred maybe.  During that time I have only had one issue, and it was a doozy.  Brass wedged in the chamber and I had to use a dead blow orange hammer to get the action open.  I wasn't the one shooting it, and I don't know what the shooter did before they called me over.  No issues since.

blaster

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Re: I built a 9mm AR Carbine.
« Reply #3 on: May 09, 2016, 04:32:41 PM »
I was all set to build a 9mm AR. once I sat down and added up the costs, I decided it was too expensive for something that was really just a toy. :( so instead I bought my Witness 10mm. :D a friend has a Colt 9mm carbine and we have put lots of rounds thru it with few problems. it ate my 124gr cast reloads without a hitch.
sqibullet - I have had that same problem with my 300 black Out. my cause was some out of spec. brass v.s. a tight chamber. I keep a short piece of 2x4 handy. some AR s have tight chambers. My 300 BLK AR pistol has the tight chamber. my 16" 300 BLK carbine eats the rounds that choke the pistol & the Mini 14 with no problem.

sqlbullet

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Re: I built a 9mm AR Carbine.
« Reply #4 on: May 10, 2016, 06:48:33 AM »
I can only guess mine was out of spec brass as well.  I have had no issues since.

blaster

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Re: I built a 9mm AR Carbine.
« Reply #5 on: May 10, 2016, 05:46:49 PM »
do you have a "Sheridan Gauge"? all the problem rounds failed the Sheridan.

sqlbullet

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Re: I built a 9mm AR Carbine.
« Reply #6 on: May 11, 2016, 06:55:57 AM »
I don't.

But....The round was pretty banged up by the time I got it out of the gun. I don't have a way to tell if ex post facto the failure was due to initally faulty ammo, or by the ride it got while clearing the rifle.

MT10mm

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Re: I built a 9mm AR Carbine.
« Reply #7 on: July 16, 2016, 12:47:57 PM »
I bought on for Palmetto that has been flawless. It was purchased as a complete rifle and came with one 32 Rd mags. I bought the colt style as I read the Glock style has problems with bolt holding open on last Rd and FTF and FTE issues.

my_old_glock

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Re: I built a 9mm AR Carbine.
« Reply #8 on: July 22, 2016, 10:07:10 AM »
I bought on for Palmetto that has been flawless. It was purchased as a complete rifle and came with one 32 Rd mags. I bought the colt style as I read the Glock style has problems with bolt holding open on last Rd and FTF and FTE issues.

The Glock lowers don't have a bolt hold open as far as I know.


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awp101

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Re: I built a 9mm AR Carbine.
« Reply #9 on: July 24, 2016, 10:17:41 AM »
I bought on for Palmetto that has been flawless. It was purchased as a complete rifle and came with one 32 Rd mags. I bought the colt style as I read the Glock style has problems with bolt holding open on last Rd and FTF and FTE issues.

The Glock lowers don't have a bolt hold open as far as I know.
All of the Glock mag carbines I've run across that offer a LRBHO have the mechanism in the upper.
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sstewart

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Re: I built a 9mm AR Carbine.
« Reply #10 on: July 24, 2016, 09:40:17 PM »
Quartercircle10 lowers offer LRBHO. It's a glock mag lower. I have large frame version with RMW Extreme upper. Works most of the time.


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