I took my AR to the Applied Ballistics range today to sight in my new Eotech 512. I started having failures almost immediately (I took it out to the range two weeks ago and it was running like a champ).
My AR is a DPMS complete lower (I didn't put any parts into it) and a Palmetto State Armory upper that I just bought. I kept the BCG from old AR upper and I have no idea where it came from.
So, first mag in, I started having failures to fire. I was shooting Tula .223. Initially I just blamed the ammo. But as I proceeded through the mag, the primer strikes started looking lighter and lighter on the rounds that wouldn't fire. Then, I had it start periodically double firing on me (while still having periodic failures to fire and some rounds still firing normally).
I stopped shooting after that. When I got home, I pulled the upper and removed the BCG. That's honestly as far apart as I really feel comfortable taking it, while being confident I can put it back together (yeah, pretty pathetic, I know).
One thing I noticed, the firing pin seems to float freely in the bolt. By that I mean I can push it in, so the pin protrudes out of the bolt face, but then it just drops back loosely. I would have thought there would be a spring in there somewhere, keeping the firing pin tautly back, leaving the hammer to slam it forward. But I don't have another AR on hand to compare it to.
Anyone have any thoughts?
My AR is a DPMS complete lower (I didn't put any parts into it) and a Palmetto State Armory upper that I just bought. I kept the BCG from old AR upper and I have no idea where it came from.
So, first mag in, I started having failures to fire. I was shooting Tula .223. Initially I just blamed the ammo. But as I proceeded through the mag, the primer strikes started looking lighter and lighter on the rounds that wouldn't fire. Then, I had it start periodically double firing on me (while still having periodic failures to fire and some rounds still firing normally).
I stopped shooting after that. When I got home, I pulled the upper and removed the BCG. That's honestly as far apart as I really feel comfortable taking it, while being confident I can put it back together (yeah, pretty pathetic, I know).
One thing I noticed, the firing pin seems to float freely in the bolt. By that I mean I can push it in, so the pin protrudes out of the bolt face, but then it just drops back loosely. I would have thought there would be a spring in there somewhere, keeping the firing pin tautly back, leaving the hammer to slam it forward. But I don't have another AR on hand to compare it to.
Anyone have any thoughts?