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Finally satisfied with my 10mm AR


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#1 OFFLINE   Mad Machinist

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Posted Aug. 17 2014 - 07:44 PM

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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#2 ONLINE   hzhardy

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Posted Aug. 17 2014 - 08:33 PM

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


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#3 OFFLINE   Retcop

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Posted Aug. 18 2014 - 05:43 AM

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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#4 OFFLINE   The_Shadow

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Posted Aug. 19 2014 - 12:18 PM

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




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#5 OFFLINE   hwonderdog

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Posted Aug. 21 2014 - 01:28 PM

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




#6 OFFLINE   Mad Machinist

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Posted Aug. 25 2014 - 07:59 PM

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, Aug. 25 2014 - 08:01 PM.



#7 OFFLINE   Mad Machinist

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Posted Aug. 25 2014 - 08:04 PM

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....... :)




#8 OFFLINE   jbg762

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Posted Dec. 20 2014 - 01:00 PM

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?




#9 OFFLINE   Mad Machinist

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Posted Dec. 24 2014 - 09:05 PM

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.....




#10 OFFLINE   sgmtino

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Posted Dec. 28 2014 - 08:57 PM

how nuch for the upper in 10mm




#11 OFFLINE   drflame

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Posted Oct. 22 2016 - 06:50 PM

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




#12 ONLINE   gshayd

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Posted Oct. 23 2016 - 02:47 PM

sweet!




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