Hey bro. I would look at your spring first. Just duplicated your problem with my mag by installing a smallest spring in it. Bolt keeps sticking and gassed out like crazy. Try a larger spring. I have the red spring on mine with the carrier that has no lines and 2 shims.
Another thing you might want to look at are those shims. Make sure you didn't get them mixed up with the ULT shims. The ULT shims are the same diameter and look just like the Lvl 10's but are .005 thick instead of .010
ULT = .005
Lvl 10 = .010
I was having ULT tunning problems day before yesterday and had realized I was using the wrong shims.
Another thing you might want to look at are those shims. Make sure you didn't get them mixed up with the ULT shims. The ULT shims are the same diameter and look just like the Lvl 10's but are .005 thick instead of .010
ULT = .005
Lvl 10 = .010
I was having ULT tunning problems day before yesterday and had realized I was using the wrong shims.
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