I ordered the 28/80 LP from hkparts and it has different markings on it vs the website. When I tried to put it into the bolt head on my PTR 9KT the tapered end that slides inside the bolt head was too thick! I am now concerned that I either got the incorrect LP (I thought they didn’t make 28/80 for full-size) or that my PTR bolt head is wonky and out of spec. A pic of the LP below.
If it don't fit, it don't fit. It would be unusual, but I would lean toward the new LP being out of spec. Have you function checked your new PTR with the original?
Yeah I took it to the range and fired 150rds trouble free with the original LP. I’m currently trying to troubleshoot why I have roller marks and the blue buffer on my Sb brace keeps getting beat to death. I’ve used two blue buffers so far. After around 300rds the buffer is beaten into small fragments l. My bolt gap is in spec so I’m confused.
I have a suppressor and Form 1 on the way so i bought the 80* LP for suppressed fire with 147gr