It's not cycling properly. Every round ejects perfectly but it doesn't always pick up the next round.
Sometimes I can get through 5 rounds fine then either the bolt closes without a round or I get this half strip/load with bolt marks on the brass. You can see the round kind of pointing up and in but the bolt is wedged closed on it. Sorry for the crappy pic sun was bright and phone wouldn't focus inside.
I think the bolt just isn't getting all the way rearward to properly strip and grab the next round. Buffer or buffer spring?
This is a new build. Generously lubed (not excessively) and everything manually cycles fine with no catches or rubs, including buffer and buffer spring. On disassembly I see no problem areas either. I've put 150 painful rounds through it now waiting for it to loosen up and it isn't. I've tried many different mags with various rounds loaded with no difference. Mags all work in other ARs.
It's a this kit with this lower build kit. I built it as shown and had the cycling issues I described above. My SBA4 came in and I switched it out and getting same result. Didn't expect it to affect it but nonetheless...
Some quick measurements, buffer tube is ~7 1/4", spring is ~10 5/8" but I don't know the weight.
Any ideas? Replace the spring? I wonder what mine is now and how low to go.
Sometimes I can get through 5 rounds fine then either the bolt closes without a round or I get this half strip/load with bolt marks on the brass. You can see the round kind of pointing up and in but the bolt is wedged closed on it. Sorry for the crappy pic sun was bright and phone wouldn't focus inside.
I think the bolt just isn't getting all the way rearward to properly strip and grab the next round. Buffer or buffer spring?
This is a new build. Generously lubed (not excessively) and everything manually cycles fine with no catches or rubs, including buffer and buffer spring. On disassembly I see no problem areas either. I've put 150 painful rounds through it now waiting for it to loosen up and it isn't. I've tried many different mags with various rounds loaded with no difference. Mags all work in other ARs.
It's a this kit with this lower build kit. I built it as shown and had the cycling issues I described above. My SBA4 came in and I switched it out and getting same result. Didn't expect it to affect it but nonetheless...
Some quick measurements, buffer tube is ~7 1/4", spring is ~10 5/8" but I don't know the weight.
Any ideas? Replace the spring? I wonder what mine is now and how low to go.