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Posted: 8/12/2022 10:26:11 PM EDT
I'm building a 10mm AR15 and I have a 556 lower that I need to find an adapter so i can fire 10mm bullets.
Could I use a 45 ACP. mag well adapter so that I could use 10mm magazines in it.
Link Posted: 8/12/2022 10:37:50 PM EDT
[#1]
No.

@Mad-Machinist
@MadMachinist
@Mad_Machinist

ETA:  If you want to use Glock mags, you'll need a Quarter Circle 10 lower.  Rudy has other options.

If you want to run Uzi/Colt mags, you could get a Hahn block & a Cav Arms Mk2 lower, as currently made by GWACS.
Link Posted: 8/12/2022 10:43:25 PM EDT
[#2]
Anderson Arms that's where mine came from.
Link Posted: 8/12/2022 11:08:35 PM EDT
[#3]
I wanted this so bad after my 9mm ar with years of g20.

Then I got the mini Roni. And 30rd ets mags.

IKinda forgot about it, but I guess this is a tag
Link Posted: 8/13/2022 12:14:09 AM EDT
[#4]
Link Posted: 8/13/2022 12:23:44 AM EDT
[#5]
Discussion ForumsJump to Quoted PostQuote History
Quoted:
I know of no current mag to run 10mm in a standard lower. I have mags and an adapter for 45, and it will feed a single 10mm round flawlessly, but still working on getting them to physically stack and travel through the mag body. You can go Glock.....QC10 is a good choice for blowback, but if you intend to go DI, get a Black Creek Precision large frame, an Angstadt Large Frame or a Wolfpack Armory large frame. Call me at the shop if you like....also what barrel bolt and buffer combo are you currently planning?????
Rudy
View Quote


The other option would be to buy an Olympic upper & mags if you can find one, long out of production.
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