feedramps

[veprak]

dump question but do bushy m4 uppers come with m4 feedramps?what is better about the m4 feed ramps?

[Epinephrine]

Only Colt can issue rifles with the M4 ramps as they own the patent. The only thing about the M4 ramps is it helps guns with Full Auto fire. So unless your gonna spend $15,000 on a Form 3 Colt M4, then the Ramsp do nothing.

[XHairs]

I kind of recall reading somewhere that the M4 ramps prevented jamming in full auto Colts using M855 ammo and that Bushmasters don't have them as a standard feature but may put them in under certain conditions.

My DPMS always fed fine using Winchester Q3131A and USA223 ammo. Then I started trying Barnaul HP & Wolf to cut ammo costs and found that those blunt tipped ammo tips hung up before the ramp, right where the beginning of the M4 ramp would start. So, I extended my feed ramps with a Dremel, ramps now look similar to the M4's and the rifle has fed everything fine ever since.