3) Feed Failures - Troubleshooting the Blowback 9mm AR

Video 3 - Feed Failures. Troubleshooting the Blowback 9mm AR.
Causes and resolutions. This is NOT comprehensive and does not cover every possibility.
Troubleshooting Diagram: blowback9.word...
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[@geareas]

Love your videos, your site was also my first resource when building an ar9.

[@paulblackburn2929]

Even with an enhanced feed cone polishing the feed cone with Flits metal polish makes a huge improvement with feeding issues!

[@dave_bob]

Enhanced feed cones are the way to go.

[@the2amendmentisinthepeople244]

I polish my feed cone with mother rim polish and it takes hollow points with no problem. I repolish after I clean it just for gp.

[@Blowback9]

Nice! I forgot to mention polishing - I'll add that to a video at the end with corrections and FAQ's.

[@user-bq9pd1mh2m]

Doug, can you do a video on enhancing a feed cone with a Dremel? Thinking of doing it on mine but would love to get your opinion/ technique first.

[@Blowback9]

I need to do this soon....

[@toddnmichelle]

I have a Foxtrot Mike FM9 that ran ball ammo fine when plinking. When I tried hollow points for the first time it jammed them into the feed cone (should mention I only use Glock factory mags). I swapped the barrel with a Macon and replaced the buffer and spring (KAK gold top/Wilson Combat) - it still jams the same way. I sent it back to Foxtrot to inspect and they assured me there was nothing wrong with it and of course didn’t have a single jam. I received it back, loaded up a magazine with hollow points, released the bolt… wanna guess what it did? I’m so sick of this thing!

[@Blowback9]

Send me an email if you would like some help with this: blowback9.wordpress.com/contact/

[@davegrimm1392]

Taccom Super Feed 9mm barrels have a lower feed ramp AND an upper feed guide. They feed 100% reliable every time. You will never get a failure to feed with one of these.

[@Blowback9]

They are another good option for feeding, but some folks were having accuracy issues a little while back. I need to confirm that those issues were all cleared up.

[@dgillz4497]

Hey doug, Is the Macon armory mag catch the only one that will work for this problem? They seem to be out of stock unfortunately.

[@Blowback9]

It's the only one I know about for the EPC-9 right now.

[@randyemerson8810]

I’m curious Doug. I am currently building a 11” with everything you’ve mentioned in previous videos. Only thing I’m adding is a suppresor. Have you done any testing with a can? Would you recommend heavier buffer weight (kynshoot - carbine set up)

[@Blowback9]

I haven't done testing per se, but I do have a can. The suppressor adds backpressure, so extra mass does help with bolt velocity and felt recoil. After a few shots the gas overwhelms any gas mitigation put in place (gasbuster handles, gas deflectors, etc), so I don't bother.