Anyone use the 18" 450 BM barrels from JSE Surplus?

[gunner1]

I'm currently gathering parts to assemble my 450 BM upper and found the barrels from JSE Surplus. Has anyone used them? Are they accurate? Do the M4 feed ramps interfere with anything?

[Bmt85]

I’m willing to bet they are Great Lakes Firearms barrels (GLFA). Pretty good from the little I’ve heard about them. The M4 feed ramps aren’t a good idea in my opinion. Although, if they are set up like Tromix’s, they won’t be an issue. Tromix basically takes a standard barrel extension and cuts down some of the bottom lug at an angle. If that’s the case, it may take a little blending/smoothing out, but should work just fine. If the barrel you’re talking about, is indeed a standard, non-modified M4 extension, you could always do the same thing yourself. It will just take some time.