BigMBobbyOP
Ultimate Member
Bobby, if you can't get this running I'll help.
Thank you. I would definitely appreciate that if I can't figure it out.
Bobby, if you can't get this running I'll help.
I've tried proper lubrication and new mags. Trying to tackle the small things first.. I'll check if the bolt falls into the gas tube without hitch...
What's next , polish the ramps?
The ramps need to be recut on the right side, then deburred. Barrel has to be removed for that.
So is that something to be left to a professional or something I can try?
It's not hard if you have the proper tools and a steady hand when grinding/polishing.
BradMacc is right but, do the BCG drop first. See what the deal is. Reworking feed ramps involves dismounting the bbl.. Looking at the scratches on the cases shows there is a problem there but, maybe not the ftf problem. Fix the small problems before addressing the big ones.
Well at least I know what was causing the FTFs now
Guess I have nothing to lose by trying.
I would appreciate if you are able to share what tools are needed or instructions on the process. I really don't know where to begin.
It's not easy for me to write out, a demonstration is better. If you let me have the upper I'll fix it and video for my youtube channel for all to see.
"The Barrel extension can cause ammo to not feed. A cratex bit on a dremel works great to fix that."
Exactly this. If the points and edges on the back side (the side facing you) of the locking lugs at the top of the feed ramps are very sharp, they can gouge and snag the round on the way into the chamber. A bullet shaped cratex bit works very well to smooth them a little. Clean it out afterwards very thoroughly.
I have the TUBBS CS buffer spring, BUT, I also run a Spikes T-@ heavier buffer with it, and have never had a problem....just saying :-)
Honestly I'm thinking about the buffer as well
Just a thought: Do your changes incrementally, one at a time. That way you'll have a better grasp of what's going on with your rifle. Change-test, change-test, etc.
It may have been said here before but, it would be nice to see a fired case. We're looking for two parallel scratches on the case, just below the case shoulder. Those scratches are indicative of (repairable) feed ramp problems that clandestine and others here have mentioned.
I'm no expert...but it looks like the bolt carrier has way to much grease. Degrease the bolt and bolt carrier including the gas escape holes on the right side of the carrier, and coat them with a fine oil; leaving the last rear half of the bolt carrier free of oil.
The buffer tube might also need degreasing. You want to make sure that no excess amounts of grease or oil gets in the buffer tube.
You'll will also have to degrease the whole inside of the receiver. I use non- chlorinated brake degreaser. Make sure you wear eye protection when you do this.