I’ve been having a lot of problems with my brand new Palmetto AR.
It’s a 16” mid length, 1:7, premium BCG. 3oz buffer. I did not build it piece by piece. bought a complete lower, barreled upper, BCG, and charging handle, all from PSA, and put it together.
I had a lot of malfunctions, with 3 different ammo's (american eagle 223 55gr, PMC 223 55gr, IMI 5.56 55gr), and 3 different mags, 1 20rnd colt, 1 20rnd Brownells, 1 30rnd Brownells, all Aluminum.
Out of 120rnds of half filled mags, I probably had 40 malfunctions.
In the midst of this I had only a mag cycle perfectly once.
Most malfunctions the round didn’t feed and bolt closed on a empty chamber. Racking it fixed that, till the next shot, where it did it again, and again, etc.
Also had 10 where the bullet was on the feed ramp, and the brass was stuck under the bolt, back end still in the mag. This seems to be caused by the bolt not going back far enough and the carrier striping the round instead of the bolt.
Bolt only locked back on a empty mag 3 or 4 times
Spent cases ejected ok with one exception.
One blown primer, popped out of case, I think IMI.
I tried 3 different amounts of lube, from light coat to dripping wet, no difference.
Dissembled and cleaned all the way down to down to the extractor, no difference.
If I cycle it by hand there are no problems.
I think this is a gas pressure issue since I am already using the 3oz buffer but I don’t know where to go next. Hopefully there is an easier answer than checking gas port size and alignment.
I have pictures of the malfunctions if that will help.
Attachment 47221
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