AR9 decisions...

Discussion in 'Pistol Caliber Carbines' started by Tucci454, Nov 26, 2019.

  1. Tucci454

    Tucci454 Member

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    I've been thinking of doing an AR9 for a while, but they're kind of cost prohibitive. However, I picked up a PSA upper here on the classifieds for a decent price so I'm all in now.

    Now I'm trying to figure out what to do about the lower. I think I want Colt mag, primarily because it looks better. The operational lrbho would be nice too.

    Finding a Colt lower at a reasonable price is proving difficult. I'm considering a regular lower with a KAK mag well adapter. Other people seem to like those adapters. I figure I'll be into it for close to the same money as a Glock lower after getting a new buffer and if I hate it, I can always pull the adapter and just get another rifle upper.

    I've been looking at the posts over there at arfcom, and those guys seem to be all over the place on this stuff.

    Anyone have more experience with these things and provide some useful advice?
     
  2. Vyntage

    Vyntage Monster

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    I do not have a KAK magwell adapter but do have three AR-9s with PSA Colt-style magwell adapters and they all work well. I can't imagine the KAKs would be anything less?
     
    Last edited: Nov 26, 2019
  3. Tim

    Tim I am....an enchanter. Staff Member Benefactor Charter Life Member

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    I have a PSA colt adapter that has worked perfectly for me over several thousand rounds. Before that, I had a Hahn insert that was just as good.
     
  4. jmccracken1214

    jmccracken1214 Well-Known Member Supporting Member

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  5. NKD

    NKD Senior Member Benefactor Kimberless Supporting Member

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    My opinion:
    Does not look better. At all. Looks goofy.

    edit: arfcom: mostly 20 somethings without a clue parroting what garandthumb said yesterday.

    Get a decent glock lower
     
    Last edited: Nov 26, 2019
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  6. Butter

    Butter In charge of all of the things Staff Member Benefactor Charter Life Member

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    Id go with a Glock lower as well. I did and have no regrets. New Frontier Armory has a LRBHO
     
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  7. nature boy

    nature boy Don’t hate the player hate the game wooo Supporting Member

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    I have a very nice ar9 I’m thinking about selling pm me if interested
     
  8. Beef15

    Beef15 B or somesuch

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    I bought the cheapest adapter I could find. ProMag. It works, put a thousand thru it quick and have slowly added maybe 500 since. Mags took some tuning.

    If I did it again, I'd probably go with a Glock mag lower but I'd probably run it in matches. I think that they may feed more directly into the chamber as well, mine beats beats pretty hard.
     
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  9. Tim

    Tim I am....an enchanter. Staff Member Benefactor Charter Life Member

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    I went with the adapter because my lower is an SBR. I wanted the option of reverting back to 'whatever' caliber if I wanted. Though, with Form 1s processing so quick these days, it would be less of a concern these days.
     
  10. NKD

    NKD Senior Member Benefactor Kimberless Supporting Member

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    Edit: Ignore me. I’ve been drinking.
     
    Last edited: Nov 26, 2019
  11. BigWaylon

    BigWaylon Head philatelist Staff Member Benefactor Charter Life Member

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    It’s just my opinion, but I think the Glock mag lowers look even dumber than the Colt mag lowers.

    I have two that take Colt mags. One has a Hahn dedicated mag block, and the other is a CMMG lower designed for the mags, no adapter needed. Both have LRBHO.
     
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  12. Beef15

    Beef15 B or somesuch

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    I agree on the looks. They're both goofy, straight mag slightly less.

    Quick search shows some Glock adapter with LRBHO.
     
  13. bigfelipe

    bigfelipe I go my own way... Charter Life Member

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    I don't understand why the Colt mags even exist anymore...
     
  14. JimB

    JimB Picking it up slowly. Benefactor Charter Life Member

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    I prefer the look of the Glock lower.

    also have a couple pistol barrels, already threaded, if you’re shopping for one.
     
    Last edited: Nov 26, 2019
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  15. Sevenshot

    Sevenshot Active Member

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    New frontier and foxtrot mike both have LRBHO. Can also convert a few AR mags to 9mm with endomags (cheapest option).
     
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  16. Slacker

    Slacker Liquor and Whores...

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    This but not as grumpy old manish.
    ;)
     
    Last edited: Nov 27, 2019
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  17. Tucci454

    Tucci454 Member

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    Yeah, they both look kind of stupid. I think the dedicated lowers look less stupid than the blocked lowers. Not by much though. I'm probably going to grab one of those mag conversions and a heavy buffer just so I can try it out. I'm hesitant to drop another $300 into this thing only to find out I hate it. I know I'm going to be stuck with it because no one is going to want to buy my cobbled together firearm.
     
  18. BigWaylon

    BigWaylon Head philatelist Staff Member Benefactor Charter Life Member

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    Have you actually shot one? You’re a looooong way from me or I’d be glad to let you try one/both of my lowers with your upper.

    I have one SBR with a 7” barrel and an Octane 45. This one has the dedicated Hahn mag block and a Hahn heavy buffer. The upper came fully assembled, including BCG, from JSE with a YHM 9mm upper receiver.

    The other is a pistol with a SBA3. It’s built on a CMMG colt-mag lower, which doesn’t look much different than one with a magwell adapter, except from the bottom. I’m running a PSA 4” upper with a 9” rail, and a custom Form 1 can tucked completely inside. It’s only been out once, and I had two, maybe three?, FTE(ject) is the first two mags. Need to get it back out to see if it was break-in issues or I need to tweak the combination of parts...of maybe clean/lube what’s there. It has a PSA heavy buffer.

    Here’s what the CMMG looks like. Standard size magwell on the outside, just machined for a colt mag on the inside. So, no better looking that the others, just one less piece to buy and fool with. I got this one when they put them on sale for $99 sometime in the last year or so. Finally assembled everything a month or two ago.

    CDA1F38F-445D-4E21-A65C-8F6852D54DAD.jpeg
     
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  19. Vyntage

    Vyntage Monster

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    In addition to dropping $300, you'll want to drop some quarters. Specifically, into the buffer tube.

    As many as you can and still have the bolt lock back. My AR9s came with longer buffers specifically for the AR9 so I only needed three quarters in each but some people have said they needed as many as eight.

    Sure, you can buy custom spacers but they are like five or ten bucks each. I was able to buy three quarters for only $0.75.

    edit - and as for the cosmetics: once the block is in it looks just like a regular AR lower except when looking directly in the magwell.
     
    Last edited: Nov 27, 2019
  20. BigWaylon

    BigWaylon Head philatelist Staff Member Benefactor Charter Life Member

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    I’ve seen this mentioned before but have never attempted it. Does that simply mean manually locking the bolt back? Or having LRBHO still function? Is it necessary to have a loaded mag (snap caps if you prefer) to make sure you don’t have too many quarters?

    Just trying to figure out if it’s something I can mess with at home. I know it’s to prevent damaging the lower and breaking the bolt catch.
     
  21. Vyntage

    Vyntage Monster

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    I grabbed an empty mag and checked both LRBHO and manually locking the bolt back while at home. With three quarters everything tested flawlessly but with four the bolt wouldn't always catch. So three seemed like the right number for the buffers PSA supplied.

    In use at the range, all three AR9s with three quarters each have been flawless as far as LRBHO and manually locking the bolt back goes.

    edited for clarity
     
    Last edited: Nov 27, 2019
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  22. Tucci454

    Tucci454 Member

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    I have not tried one yet. As far as the appearance goes, I guess it's really not that important. I like the look of the PSA Colt mag version. Also the Spikes version, with the exception of the funny looking trigger guard on that one. The material in front of the mag well apparently offends me.

    Then there's the MP5 mag version from New Frontier. That is really pretty and the long mags are even curved a little. That wouldn't work with the upper I bought though, so more bucks in machine work to go that route.
     
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  23. Beef15

    Beef15 B or somesuch

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    If you like shooting and you get it to run reliably it is highly unlikely you won't like it. Quiet, cheap to feed, easy on closer steel targets, still pretty capable on paper/steel at 200yds, same operations and skills as any other AR.
     
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  24. NKD

    NKD Senior Member Benefactor Kimberless Supporting Member

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    Sober opinion: I do agree a lot of AR9's do look stupid. I swear mine shoots great but it is undoubtably my ugliest gun, and I have plenty of ugly guns, including three hideous grocks.

    It's a butterface for sure, and I intend to ugly-it-up some more with a 15" carbon fiber handguard, when I stop being lazy. Even the trigger is ugly.

    IMG_3467.jpg
     
    Last edited: Nov 27, 2019
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  25. NCLivingBrit

    NCLivingBrit Clueless Protoplasm

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    Old dudes who think Colt still makes good kit?
     
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  26. bigfelipe

    bigfelipe I go my own way... Charter Life Member

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    They call them Boomers now whether it applies or not...
     
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  27. BigWaylon

    BigWaylon Head philatelist Staff Member Benefactor Charter Life Member

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  28. Tucci454

    Tucci454 Member

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  29. BigWaylon

    BigWaylon Head philatelist Staff Member Benefactor Charter Life Member

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    Between the different barrels, silencers and stock/brace, there’s about a 7” difference in mine. (3” for barrel, a little over 2” for silencer, and the rest in the stock/brace)

    4D6F1C06-B0F1-4360-A704-4BC294B25427.jpeg
     
  30. BigWaylon

    BigWaylon Head philatelist Staff Member Benefactor Charter Life Member

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    Tried it today with the 4” pistol. Could only get one quarter in there and still have the bolt lock back. Guess the longer/heavier buffer from PSA is doing the job.

    Didn’t try it with the SBR, as it’s my primary HD choice and I’ll wait until I’m at the range. I’m guessing it’ll be about the same since it has a Hahn pistol caliber buffer.
     
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  31. Sevenshot

    Sevenshot Active Member

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    You find a deal? They work great btw.
     
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  32. Tucci454

    Tucci454 Member

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    Good to hear. I just bought it from their site. $30 shipped.
     
  33. Tucci454

    Tucci454 Member

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    Endomag came today. Looks kinda cheap, but was a snap to install and seems to work good with a manual function check. Put the big buffer in, 3 quarters for this one too. We'll see what happens at the range. Hopefully it will run OK like this so I can just buy a cheap lower and be done with it.
     
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