My M4 feed ramps are apparently not machined right.
9/10 rounds are getting pushed into the casing, and upon further inspection, i think thats what’s happening.
Sorry for the bad pics…
this is what the rounds look like after trying to feed into the chamber:
I haven’t been able to find anyone here in Vegas who seems as knowledgeable as all of the great people on this site, any suggestions?
How much would it cost to get something like this fixed?
I got the upper from a friend, and just want to get it fixed.
pretty much ruined my day at the range
We just had a problem similar to this, we were trying to run a rifle class in our indoor range and we used Frangible Ammo (Sorry I do not know the maker). After NUMERous malfunctions, where rounds would not feed and it seemed like they were crashing into the receiver and not feeding. By the way this did not happen with Federal XM193 in the same gns on the same day in our single lane rifle trap. When we compared the case length of the crappy non-feeding frangible ammo to the XM193 I noticed the XM193 cases were longer. I do not know how much longer, but they were longer at least an 1/8".
TRY this. Compare your above ammo to a known QUALITY not reloaded ammo.
Yes it is. Dano just accurately described everything that is wrong with your rifle. Even if you ignore the feedramps, look at the huge machining marks in the barrel extension.
If I were in your position I’d call Bushmaster and ask them to step in.
Call butchmaster and see if they will replace it- Even if they replace it, you will always have this taste in your mouth, so you may just want to switch brands- Even a CMT/Stag upper doesn’t look like Helen Keller got her hands on a dremel tool.
Forgive me. I clearly have much to learn, young grasshopper.
The only reason i said it wasn’t helpful, is because i allready
talked to gotm4, and he said he’ll look at it for me.
I guess all the posts in this thread weren’t read.
Thanks.
If a third party did that terrible thing to the barrel, Bushy won’t do anything. They should be under no obligation to.
I would ask my friend for a full refund.
[EDIT]
After looking at the pictures more, I’m pretty sure I know what happened. Someone tried to install a barrel with no extended feedramps into an M4 cut upper receiver. After seeing that it wouldn’t feed they did a “bubba” dremel job to the barrel extension.
The reason the bullets are getting pushed up because they are hitting the steep edge in those home made M4 ramps. You can clearly see where the rifle ramps were “modified”
Funny… I normally don’t post in “troubleshooting” threads cause there always like a Paul Harvey story.
I start to read this one and after the poster describes his problem he never mentions the make and model (my first thought was who’s upper /BCG is it…)
after some one asks… he tells… (my next thought is (did you buy it or build it)
then he post’s that he did not buy it, but got it from a buddy…
and so now the mystery is solved…
you bought a used upper from a buddy who butchered it with a dremel to add something you don’t need… and now it works like crap… there’s a lesson in there for anyone who want’s to read it…
and now you know… the rest of the story…
Sorry Pitbull… nothing on you… your story just illustrates a good point why the AR has gotten such a bad rap over the years… your story gets repeated every day on other sites…
Those are definitely some interesting looking feed ramps. A swift kick in the nuts for the asswipe that did these would most definitely be in order. Passing this hack job onto another shooter would be worth another boot to the nuts as well.
