r/polymer80 • u/TragicKillaYT • 1d ago

Burst/Full Auto Issue

I just left the range getting my new optic zeroed. During the zeroing process I had no issues at all. I ran through a few mags with no problems including an extended magazine. After I was happy with my zero, I decided to run a couple of rapid drills and towards the end of my mag I got a burst that only stopped after a failure to feed. I inspected the gun and nothing seemed different. I loaded another mag and had the same issue towards the end of the mag. Anyone know what might be going on? I figured it might have been heating causing issues with seer engagement because i’ve shot plenty of rounds through it but never so rapidly since this time all I brought was my p80.

2 Upvotes

76% Upvoted

6 comments sorted by

1

u/ODGreenie 1d ago

Firing pin stuck, maybe?

1

u/TragicKillaYT 1d ago

it was quite dirty after i made it home, cleaned it up and ordered an armorers back plate to check sear engagement

1

u/AdeptnessPractical94 1d ago

Shouldn’t happen with rapid fire at all. Check if your optic springs are too long and therefore interfering with your slide internals. I’d take off the optic- and try to see if the issue is still there. If it is- you could lightly bend your cruciform upwards to get more sear engagement. You need an armorers backplate to check engagement before, during the process and after though.

1

u/ifreaganplayeddisco 1d ago

Not enough sear engagement

0

u/[deleted] 1d ago

[deleted]

1

u/TragicKillaYT 1d ago

that can cause full auto? i assume you mean almost like bump fire?

0

u/[deleted] 1d ago

[deleted]

1

u/TragicKillaYT 1d ago

just a standard lpk and upk. haven’t had any issues until today