I bought a Fleming MP5 conversion with an autosear and I'm having a huge problem with the gun destroying carriers and locking pieces. The first time this happened I went to disassemble the carrier group and the locking piece would't come out of the carrier. I gave it to an MP5 armorer and he put it through an ultrasound bath and had to remove the locking piece with pliers. He said the locking piece was slightly bulged in the rear and was catching inside the carrier. He removed a slight amount of material from the looking piece using a lathe to get it back in spec. I bought a new locking piece recently and it would't fit in the carrier. Just bought a new carrier this week and installed the new locking piece with my existing German bolt.
Approximately 400 rds. into my range session today and the gun started firing at a crazy high cyclic rate and I noticed when my buddy was shooting that there was a lot of fire coming from the ejection port as if it was unlocking prematurely. I stopped firing and headed home. Same issue as before. The locking piece would not budge free from the carrier. I kept spraying it with oil and finally got it out using some vice grips. I cleaned everything up really well and the locking piece won't fit into the carrier at all. It seems like the same thing happened again where the rear of the locking piece is belled ever so slightly to where it won;t fit in the carrier. Now I'm down two locking pieces and two carriers. Any idea what the hell is happening?
I was using a new recoil spring assembly with the new locking piece and carrier.
Approximately 400 rds. into my range session today and the gun started firing at a crazy high cyclic rate and I noticed when my buddy was shooting that there was a lot of fire coming from the ejection port as if it was unlocking prematurely. I stopped firing and headed home. Same issue as before. The locking piece would not budge free from the carrier. I kept spraying it with oil and finally got it out using some vice grips. I cleaned everything up really well and the locking piece won't fit into the carrier at all. It seems like the same thing happened again where the rear of the locking piece is belled ever so slightly to where it won;t fit in the carrier. Now I'm down two locking pieces and two carriers. Any idea what the hell is happening?
I was using a new recoil spring assembly with the new locking piece and carrier.