I finished my build and took it out to the range twice and so far I have put 140 rnds. through it. I've been experiencing short stroking. The first trip out to the range I shot 60 rounds of 55gr pmc bronze a few times I had failure to feed and the bolt wouldn't lock back on an empty mag. The second trip out I decided to try different ammo and brought Remington umc .223 55gr and some american eagle 62gr .223. First i checked to see if the bolt would lock with the 55gr Remington first and it did, then continued to shoot more. After I shot 60 rounds of the Remington i had two that didn't load and with loading 10 rnds at a time the bolt would only lock back maybe twice. Then I decided to try the american eagle, I loaded 20 rnds and fired. I didn't have any problems and when the mag was empty the bolt locked back like it should. I know this is due to either under gassing or too heavy of a buffer but im not sure which one it is. I did notice my rounds were ejecting at about the 4 o'clock position
The build:
Aero precision upper & lower
Spike tactical st-t2 buffer(4.0oz I weighed my-self), spring, and buffer tube
16" Ballistic Advantage barrel w/lo pro gas block mid-length gas system .223 wylde caliber
vg6 epsilon muzzle device
Psa lpk w/QMS trigger
Failzero nickel-boron bcg
So Im not sure if I should get a lighter buffer because the only thing light would be a carbine buffer or get an adjustable gas block and call it a day.
The build:
Aero precision upper & lower
Spike tactical st-t2 buffer(4.0oz I weighed my-self), spring, and buffer tube
16" Ballistic Advantage barrel w/lo pro gas block mid-length gas system .223 wylde caliber
vg6 epsilon muzzle device
Psa lpk w/QMS trigger
Failzero nickel-boron bcg
So Im not sure if I should get a lighter buffer because the only thing light would be a carbine buffer or get an adjustable gas block and call it a day.
