Kinda general info that hopefully will help someone else and also a question:
I put together an Orca from PET-CF (which is amazing...I'll post separately about that) and the build seemed to go well. Initially it would go into battery but pulling the trigger would yield a "click" but no discharge. I figured it had to be the barrel/bullet's relationship/distance to the firing pin and, initially, measuring using a standard digital caliper it appeared I was within spec; the problem I subsequently realized is that the rear of a standard digital caliper is so narrow it's tough get consistent measurements and to figure out if you're truly parallel to the surface you're measuring (or, said a different way, if you're truly perpendicular to the barrel). Depending on how I held the caliper (and depending on which face of the lower's supports I held it on) I could get measurements anywhere from 0.250 to 0.278 inches ) which are both outside of spec.
I ended up buying a digital tire tread gauge on amazon (for under $10) that had a much wider base to allow more consistent measurements. Turns out I was about 0.01 inches short of where I needed to be. I hammered the barrel in a little and it now fires properly.
The question/problem is that while it extracts the spent casing, it doesn't eject. I've read several opinions on this (obviously geared toward traditionally-purchased guns) that opined it's either "under-gassed" or the buffer weight/spring is either too heavy or too light. 🙂 Any thoughts?
Thanks in advance for any knowledge!
AW
