I just bought a Bushmaster two weeks ago. The gun was basically new. I don't think the guy had ever even shot it. We took it out last weekend and shot about 80 rounds through it with no problem. I did notice that it was flattening one side of the case mouth though. Then yesterday I went back to the range with it and it may as well been a single shot. It would fire the first round, the the second trigger pull would just click. It would eject the casing most of the time, but sometimes wouldn't. It would go back just far enough to cock the hammer, but not enough to cycle a new round. Every now and then it acted like it didn't want to pick up the first round when I pulled the charging handle. It was oiled, but not excessively. I did try to add a little RemOil after it started acting up. I used 3 different mags from different manufacturers and 3 different kinds of ammo (Remington UMC, Federal, and Monarch).
Any ideas as to what could be wrong? A friend of mine was there with his AR, but I didn't think to try switching bolt assemblies and/or the buffer assembly with his.
Any ideas as to what could be wrong? A friend of mine was there with his AR, but I didn't think to try switching bolt assemblies and/or the buffer assembly with his.