Extreme Budget 9mm AR Kit Buildup. Will it Run?

[permaneo vox]

Test firing with the new bolt & Colt mags still resulted in 50% feeding. No issues extracting.

So, now I teardown & recut the feed cone.

 

[permaneo vox]

You can see where the case is binding, going into the chamber.

 

[SouthernSlammed]

Problem bolt on left, known good bolt on the right.

View attachment 35211

a lot of difference in those bolts!

 

[permaneo vox]

Feed ramp altered & polished.



Bolt modified to correct interference with Colt mag.

 

[permaneo vox]

It runs 100% on a New Frontier Glock lower.

 

[SouthernSlammed]

@permaneo vox, who is the barrel and bolt from?

Just to be cautious! Awesome if you have the machines to make it right. Terrible if not and have to spend more on budget to fix it!

 

[permaneo vox]

The bolt, I'm not sure. It had very sharp edges all over. But it did 'match' the barrel, headspace wise.
The sharp edges chewed up the Colt pattern ejector, that had to be deburred once I noticed it.

Labor wise, if you paid someone to do the barrel & bolt work, it would cost about $100.

I have it running 100% with Colt mags now. Glock mag lower took less overall work & time.

The barrel looks like Kaw Valley, based on the engraving, but I'm not certain.

 

[permaneo vox]