ask away faygos.
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I got a D50 but it was always jamming, so thinking I might just got a dud, I got another one and it runs just as reliably (like shit). Tried it in multiple builds with different ammo. The bolt ends up sitting in and denting the middle of the casing when trying to feed. Is this a known issue?
What BCG are you using, in what receiver set?
Toolcraft bcg's, AERO uppers/lowers.
Spez: all in 7.62x51
I've seen D50's work with that config. It sounds like your mag isn't getting the round high enough, is too slow in presenting the round, or your BGC isn't low enough to strip the round out. The only one you can fix would be to slow the cyclic rate with a heavier buffer setup, if the mag feeds fine operating the bolt manually. Also check to see if your BCG is retracting too far into the buffer tube, a few quarters down the tube as spacers will fix that. A call to Magpul may fix it, or they may send you a new one to try?
Dunno if it matters, but with the bolt closed I really have to hammer on em to get the mag release to catch. Open bolt is no problem. The upper and lower are matched pretty well and they run well with other pmags. Oh God I'm looking at buffer info again. I thought that was just a bad dream.
What happens if the bcg retracts too far? This was kinda relevent. Checking bolt travel sounds like a good idea.
I did hand crack a bunch and they worked fine. Solid advice.