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Old June 8th, 2020, 07:46 PM #1
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Ar9 pistol build help

Sorry if this has been asked I did search but couldnít find anything.
Iím a newbie to building, I did build a LR-308 last year but not from ground up. Now I want to do a pistol build from an 80% lower. My biggest issue is parts list and what manufacturer. Iím unable to find an ar9 lower without the trigger guard so I will use an ar15 and mag well adapter.
What about buffer tube barrel and all the other parts.
Anyone care to share a parts list?

Also thinking of a 300 blk but have heard of some people with issues with them.

Thanks in advance.

Ps the pic is something similar to what I am looking for.
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Old June 8th, 2020, 09:11 PM #2
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IDK. AR9s can be finicky. Why not buy a dedicated lower? They're cash and carry.
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Old June 8th, 2020, 09:27 PM #3
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Quote:
Originally Posted by outrider58 View Post
IDK. AR9s can be finicky. Why not buy a dedicated lower? They're cash and carry.
I love those MP5 mag lowers.
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Old June 8th, 2020, 09:52 PM #4
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Quote:
Originally Posted by outrider58 View Post
IDK. AR9s can be finicky. Why not buy a dedicated lower? They're cash and carry.
That thing looks so good.
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Old June 8th, 2020, 10:24 PM #5
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Quote:
Originally Posted by outrider58 View Post
IDK. AR9s can be finicky. Why not buy a dedicated lower? They're cash and carry.
Honestly kind of petty 🤷🏻*♂️ But canít find one without the trigger guard. Was planning on using strike industries trigger guard.

Other than the lower what else is finicky? I was going to do a 300 blk but heard those were finicky
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Old June 9th, 2020, 09:08 AM #6
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Quote:
Originally Posted by outrider58 View Post
IDK. AR9s can be finicky. Why not buy a dedicated lower? They're cash and carry.
^^^ +1 to The Wise Clown ^^

Or:
I know that their is plenty of .300 BLK lovers on here that can help you give advice on the right buffers, best barrel length & gas blocks so you could have a perfect (not-so-finiky) .300 build.

I'd love to build a .300 supressed AR one day.

Quick Google search so I have no clue about the manufacturer :

https://aaomfg.com/80-glock-9mm-lower-lrbho-fg-raw

https://www.smftactical.com/9mm-80-c...receiver-slim/

https://americanresistancegear.com/p...no-ffl-needed/

https://www.totalwartactical.com/pro...nodized-black/
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Old June 9th, 2020, 06:31 PM #7
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This may or may not help but options are there
https://www.80-lower.com/search.php?...uery=Ar9+lower

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Old June 9th, 2020, 07:22 PM #8
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Quote:
Originally Posted by woodymd View Post
Honestly kind of petty 🤷🏻*♂️ But canít find one without the trigger guard. Was planning on using strike industries trigger guard.

Other than the lower what else is finicky? I was going to do a 300 blk but heard those were finicky
PCCs can be a bit harder to tune than 300lks. With 300s, most of the trouble is managing gas flow. Generally, a soft buffer spring and H2 buffer is a good place to start. Add an adjustable gas block, and you can dial the gas flow where you want it.

With blow-back PCCs, You're basically stuck with controlling the cycling through resistance i.e. the buffer and spring. Adding LRBHO adds another dynamic, then add the ejector. Plus, you have a variety of PCC BCGs that have their own idiosyncrasies. Now you want to mill out your own 80% lower.


I might be making more of this than might be necessary, but in my mind, the fewer links in a chain, the fewer the chances of failure in that chain.
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Old June 10th, 2020, 12:05 PM #9
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Quote:
Originally Posted by outrider58 View Post
PCCs can be a bit harder to tune than 300lks. With 300s, most of the trouble is managing gas flow. Generally, a soft buffer spring and H2 buffer is a good place to start. Add an adjustable gas block, and you can dial the gas flow where you want it.

With blow-back PCCs, You're basically stuck with controlling the cycling through resistance i.e. the buffer and spring. Adding LRBHO adds another dynamic, then add the ejector. Plus, you have a variety of PCC BCGs that have their own idiosyncrasies. Now you want to mill out your own 80% lower.


I might be making more of this than might be necessary, but in my mind, the fewer links in a chain, the fewer the chances of failure in that chain.
ok so you convinced me for at least now I'm going to go the 300 blk for the first one then do the 9. now I just need to find a jig
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Old June 11th, 2020, 08:35 PM #10
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Quote:
Originally Posted by woodymd View Post
ok so you convinced me for at least now I'm going to go the 300 blk for the first one then do the 9. now I just need to find a jig
5D Tactical makes one for AR-15 and AR-9 lowers....
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