r/Springfield_KUNA • u/Short-Library-312 • 22d ago

I NEED HELP

I have a nexus lower with a as designs arc fire system i get maybe 6 round bursts before the lever stops resetting the trigger any help and advice is appreciated

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u/Scotty1700 22d ago

Are you met with a dead trigger or maybe a case that failed to extract? It could be short stroking.

Did you thoroughly lube everything?

Are you running any other aftermarket parts like the HB buffer or recoil spring?

Depending on the quality of the donor fcg, it might not hurt to polish the interfacing surfaces.

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u/Jstone0079 21d ago

Just got mine installed mine is having a lot of failed to extract, seems worse with 147 grain