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Mad Machinist

Finally satisfied with my 10mm AR

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Quarter Circle 10 Large frame Glock mag lower , DI upper built by me..... :segrin: ...gotta get a few high cap mags.......all I had was the 10 round for testing.

 

10mm_zps0ce9f023.jpg

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It uses a gas system? Sounds interesting and I like the 10mm idea

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Congratulations !

No doubt you are the first one on your block.

 

Just how hot can you load those puppies given the inherent strength of the AR chamber design?

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Sweeeet! Hope it runs like a sewing machine for ya! :)

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Which bolt did you use to accomodate the 10mm case head?

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Which bolt did you use to accomodate the 10mm case head?

I took a 5.56 bolt and opened it up with a carbide boring bar......

 

Congratulations !

No doubt you are the first one on your block.

 

Just how hot can you load those puppies given the inherent strength of the AR chamber design?

Haven't done a lot as far as load development......but I screwed up a few months back and forgot to open the flash suppressor on a 45 I built up and stacked five rounds behind a 308 hole......cut the barrel to 11 inch and I'm still shooting it.....no damage whatsoever to the action. It would be my guess that you can load the 10mm to maximum levels with no worries...as long as you aren't flattening primers or showing signs of excessive pressure go for it......

 

Had a customer come by the shop today having issues with his Olympic Arms 10mm....let him shoot mine......look for a 10mm on gunbroker soon...LOL....he ordered one of my DI 10's on the spot.

Edited by Mad Machinist

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It uses a gas system? Sounds interesting and I like the 10mm idea

It is a custom barrel, gas block, and gas tube, with a modified barrel extension, bolt, and bolt carrier..........but it is DI and the recoil is very soft....... :)

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This is exactly what I've been trying to figure out if it was possible. Does the DI AR bolt and/or carrier have to be modified to feed from the Glock magazines like the Colt 9mm SMG style bolts do?

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Yes.....clearance cuts are required in the bolt carrier.....I see you are in Atlanta...I'm in Macon....bring some ammo ride down and give it a test drive.....shop is right off I-475 :D: Get you a large frame QC10 lower ordered and I'll be happy to build you one if you really like it.....

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how nuch for the upper in 10mm

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I'm building one of these myself, using the Quarter Circle lower for large Glock mags,can you tell me who is DI and they have a web site

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sweet!

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I built the first one.....and was never able to duplicate till now....backed off of it and came back with the introduction of the new Angstadt large frame lower....Had a breakthrough in the breech design that seems to have completely solved the occasional feed problem that kept me from releasing......In testing now, finished 4 different barrels that will be in separate uppers.....and waiting on 2000 rounds of 10mm ammo to arrive.

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I'd like to purchase a 10MM DI barrel from you. Please contact me as I'm new to this Forum and not sure how to PM you yet. Thanks!

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I'd like to purchase a 10MM DI barrel from you. Please contact me as I'm new to this Forum and not sure how to PM you yet. Thanks!

Hover your mouse over his name and click 'Send Message"

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