10 MM AR15 pistol!

[1096369fred]

Hey Guys,
Newbie here.... And got a couple of questions.... (Hopefully not dumb ones!)

I had a bit of an epiphany this morning, and found this site  while hunting for info....

My story starts about a year ago, when Palmetto State Armory had a sale on a .45 ACP AR15 Glock lower.... Well, thinks I, that would be a pretty sweet set up.... As usual, money was tight due to going steady with a mortgage, and a renovation project that  won't die....

Anyway, I bought the lower.... Figuring when the checking account recovered, I'd pick up the upper and go from there.... Free to live a life of fulfillment and happiness.... Well, that didn't work out....
Palmetto has been sold out as of  today, of the .45 pistol uppers..... With no end in sight.... Soooo...I
decided to hunt up a compatable .45 Upper from other manufacturers.... That also has been a conundrum.... Most places were out of stock or super expensive....  Oh, damn... The .45 ACP AR IS the Red-Headed step child of the AR world.... So now I know.....

Anyway.... To get to the point.... While in my endless journey to find a .45 Upper.... I stumbled apon
This little jewel in 10mm..... And having picked up a G-40 long slide last year.... The lightbulb went on over my head.....

https://moriartiarmaments.com/ar-10mm-8?-pistol-caliber-side-charging-lrbho-complete-upper-with-bcg-–-10mm-10mmur-8sidecharger?search=10mm

I was debating the standard charging upper, for $399 or the side charger for $550.... As I just got my
Refund in... And will only do something stupid with it.... Like pay bills..... Drunken sailor mode engaged!

Ok.... Here is my question.... Asked in the nick of too late.... How are these.... Anyone use them for a build?

I know my Glock 40 10mm magazines lock in fine in my Palmetto lower.... But what about the aftermarket large capacity (standard!), .45 ACP  mags.... Will they work if modified to contain the
10mm round? Is one after market better then the other.... (I do know about Promags!!!).

I found a link that said yes, it is doable... On YouTube....  but... It has been removed (to hell with them), like We are building a workshop nuke, right?

Anyway.... Sorry for being long winded.... Thanks for the help.... Assuming I didn't do a stupid.... I'll post pics.  when done....

Thanks!
Fred

FYI... for the good of the order.... SB Tacticals new SB3A,  5 position adjustable brace, will go on sale at the end of the week....

[sqlbullet]

I have not used the upper.  I found the thread at ar15.com that kinda lambasted them on the character of the president, then I found this at the calguns archive:

http://www.calguns.net/calgunforum/archive/index.php/t-1148219.html

About nine posts in to that thread the owner herself chimes in, explains the issues that ar15.com had found (mean ex during an ugly divorce stirred some trouble about nothing).

I guess I am saying I don't know a reason not to give them a shot.  Personally my dream 10mm AR is DI not blowback, but if this meets your general requirements no reason I see not to take a chance.

Magazines.  Buy the KRISS magazine extender for Glock 21 mags, and install them on Glock 20 mags.  You will have to use some pliers and alter the magazine spring a bit to fit the 10mm follower, and you will have to either file or dremel out the inside of the glock 20 mags to smooth the transition, as the G20 mags are bit smaller inside than the G21 mags.  But with about 10 minutes of effort per mag you can have 30 round+ 10mm mags.  I have four or five of them.

Finally, if you decide to break up with your mortgage and want to try a different one for a few months, feel free to borrow mine 

[Azrckcrawler]

I am having a heck of a time trying to get my 10mm AR pistol working.  The upper and bolt look identical to the ones you show. A couple of good threads I have found that had some interesting information -

This one talks about how the lowers designed for 45ACP Glock magazines may be an issue for 10mm builds due to the mag release location and width differences between the 45 and 10mm magazines.  Thread here -

https://www.ar15.com/forums/ar-15/10mm_quarter_circle_10_build/15-678460/

I can attest my large frame Glock lower allows my 10mm Glock mags to move a lot.

Buffer weight is also critical.  New Frontier Armory recommends 10oz or heavier buffers, See Q&A towards the bottom of this link -https://www.newfrontierarmory.com/shop/c-45-billet-lower/

QC10 recommends 9-11oz for 45ACP.  I know my pistol came with a 2.9oz buffer which is way below what most places recommend.

Good luck.






 

[1096369fred]

Hey Guys,

Thanks for all the info. This is the lower I picked up last year.... And yes it does come with a 10 oz.
buffer..... I'm planing on mostly using this for plinking.... And maybe as a truck gun.... So will mostly use medium power loads... So not too worried about it getting beat up with wrist buster stuff!

http://palmettostatearmory.com/psa-pa-45-45acp-billet-complete-classic-pistol-lower-uses-glockr-style-magazines.html

I am worried about the magazines.... While the G-40 mags do snap in fine.... The mag release does
Cant the mag slightly to the left at the fron of the mag body.... May be trouble! I am thinking I may be
Better off tweeking a G-21 mag that fills the mag well.... I think I may try a Glock factory 12 round and maybe a KCI 26 rounder and see how it works.... If that works.... Then I'll try the Kriss extensions...

I guess if it turns into a jamm'n Jenny nightmare.... I could change out the barrel and bolt for .45 ACP ones....
Oh well.... These are gonna be more work then slapping 5.56, 6.8 and even the 9mm's that I have done in past.... Oh well..... I love a challenge!

Thanks Guys!
Fred

[sgmtino]

Rudy at Macon armory can get you up and running with your 10mm he did wonders for me with mine.

[Mike D]

I am having a heck of a time trying to get my 10mm AR pistol working.  The upper and bolt look identical to the ones you show. A couple of good threads I have found that had some interesting information -

This one talks about how the lowers designed for 45ACP Glock magazines may be an issue for 10mm builds due to the mag release location and width differences between the 45 and 10mm magazines.  Thread here -

https://www.ar15.com/forums/ar-15/10mm_quarter_circle_10_build/15-678460/

I can attest my large frame Glock lower allows my 10mm Glock mags to move a lot.

Buffer weight is also critical.  New Frontier Armory recommends 10oz or heavier buffers, See Q&A towards the bottom of this link -https://www.newfrontierarmory.com/shop/c-45-billet-lower/

QC10 recommends 9-11oz for 45ACP.  I know my pistol came with a 2.9oz buffer which is way below what most places recommend.

Good luck.

I would say that your mag issue is related to the lower and not the magazines. Externally the 10mm and 45ACP mags are the same in size.

I built mine on a QC10 lower and a RMW Extreme DI upper. I ended up having to use a 9oz buffer from Clint at heavy buffers to get it to run right.






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[1096369fred]

By Mike D,

What buffer was giving you troubles prior to getting it running with your 9 oz. buffer?

I assume a lighter one?

Thanks!
Fred

[Pablo]

I would anticipate a LOT of problems with a DI 10MM AR. Find my 10mm AR Thread. See what I went through. A 10mm AR pistol is really susceptible to "limp wristing" I guess I have to think why a heavier buffer helps, but I guess it delays the BCG. I went the opposite way with my rifle and made the BCG really light and super slicked up everything before it worked well.

[Azrckcrawler]

I am having a heck of a time trying to get my 10mm AR pistol working.  The upper and bolt look identical to the ones you show. A couple of good threads I have found that had some interesting information -

This one talks about how the lowers designed for 45ACP Glock magazines may be an issue for 10mm builds due to the mag release location and width differences between the 45 and 10mm magazines.  Thread here -

https://www.ar15.com/forums/ar-15/10mm_quarter_circle_10_build/15-678460/

I can attest my large frame Glock lower allows my 10mm Glock mags to move a lot.

Buffer weight is also critical.  New Frontier Armory recommends 10oz or heavier buffers, See Q&A towards the bottom of this link -https://www.newfrontierarmory.com/shop/c-45-billet-lower/

QC10 recommends 9-11oz for 45ACP.  I know my pistol came with a 2.9oz buffer which is way below what most places recommend.

Good luck.

I would say that your mag issue is related to the lower and not the magazines. Externally the 10mm and 45ACP mags are the same in size.

I built mine on a QC10 lower and a RMW Extreme DI upper. I ended up having to use a 9oz buffer from Clint at heavy buffers to get it to run right.






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I remember Glock 21 and 20 magazines being interchangeable. I no longer have any factory Glock 45 double stack magazines but the aftermarket extended 45acp magazine fits much better in the NFA magwell than the factory Glock 20 magazines. I would call it snug where the Glock 20 mag is more hot dog in a hallway.....