Del-ton upper, and Stag lower?

[dwalker460]

I have seen non-M4 uppers with M4 barrels and vice versa have issues like your reporting.

[CMP_5.56]

I have seen non-M4 uppers with M4 barrels and vice versa have issues like your reporting.

The barrel has m4 ramps, and the upper has them too. There are a lot of sharp edges on the barrel extension. So polishing the Ramos my be a simple way to get the rifle running I don't think it's the end reality fix, but it may get it running.

[BPTactical]

Odd that it would strip and chamber a dummy and yet not a live round.
Don't over ramp it.
Still doesn't make a lot of sense that it ran before as you had mentioned.

[CMP_5.56]

I'm wondering if it is just stacking tolerances. Noveske bcg, stag lower, del-ton upper, and soon. I'm nit going to stone my ramps, just Polish with a teardrop polisher, staying with the ramp angle.

And I'm wondering if it ran before Because the tolerances were stacked the other direction. But I put my bcg in another upper, with my lower, no problems. My lower, and another bcg with another upper, no problems. Another bcg, another lower, and my upper, same problem. So I think the weakest link in my Frankenstein rifle, is my barrel. And possibly the barrel and upper. But I can't afford another barrel, or complete upper, so fixing what I have is about all I can do.

If I polish the ramps, and still have issues, then you'll get your hands on it Bert.

[BPTactical]

More than likely...

[CMP_5.56]

So, without actually firing my rifle, the polish job seems to have worked. I guess I will see after I put some rounds through her.