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Page AR-15 » Rimfire and Pistol Calibers
AR Sponsor: bravocompany
Posted: 1/7/2017 11:41:37 PM EDT
I just learned the hard way that New Frontier 9mm uppers do not function with colt mags. Wish I had found this thread a couple of months ago.

So now I have to decide whether to pay my gunsmith to mill out the chamber, or replace it with something else. How costly and risky would it be to have it modified by a gunsmith?
Link Posted: 1/8/2017 7:16:10 AM EDT
[#1]
Quoted:
I just learned the hard way that New Frontier 9mm uppers do not function with colt mags. Wish I had found this thread a couple of months ago.

So now I have to decide whether to pay my gunsmith to mill out the chamber, or replace it with something else. How costly and risky would it be to have it modified by a gunsmith?
View Quote


The Mad-Machinist on here can likely fix you up.
Is it the feed lips on the lower that are too wide? If so, file the outsides down a little.
Link Posted: 1/8/2017 8:58:08 PM EDT
[#2]
Page AR-15 » Rimfire and Pistol Calibers
AR Sponsor: bravocompany
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