Are these feed ramps GTG?

[021411]

I know RRA isn't known for making really nice M4 feed ramp cut on their rifles (upper receiver). Here's what I have. I'm shooting semi only...at most rapid fire (if I have to). Do these look like a potential weak point to you guys? They aren't machined really deep. I'm trying to right the wrongs so to speak if there are any on my Entry Tactical.

[Cagemonkey]

Looks like they did a little Dremel work on an standard receiver that didn't have M4 feed ramps machined into it. I wonder if the barrel ext. is regular vs. M4? It should be good enough, but I don't think it has a genuine M4 receiver/receiver ext. feed ramps. Looks like what I did to a Stag upper I once had.

[Paulinski]

I always wondered why RRA bothered to dremel the feedramps.

I mean the M4 upper is only few $$ more than non M4 and the time with the dremel is not free.

[021411]

I guess the only true way to tell is to put rounds through it. But generally speaking, do I have something that is bad?

[Cagemonkey]

I guess the only true way to tell is to put rounds through it. But generally speaking, do I have something that is bad?

I don't think you'll have any problems, as long as you use good mags and shoot 55-62 gr. FMJ ammo IMHO.

[021411]

FMJs and especially a crapload of soft points because that's what we are allowed to carry in our work carbines. No FMJs are allowed.

[austinN4]

Knowledge base threads: http://m4carbine.net/showthread.php?t=193

[C4IGrant]

I would try some 69-75gr ammo and see what you get. If the gun runs, then you are GTG>

From looking at the pic, they look like a hack job and would not accept them.



C4

[Iraqgunz]

Just curious did you do that Dremel job yourself? Just curious because in pic #3 there appears to be shavings on the right side of the inner part of the receiver.

[021411]

Just curious did you do that Dremel job yourself? Just curious because in pic #3 there appears to be shavings on the right side of the inner part of the receiver.

Hell no. It's lint/dust from my floor and the light. The rifle is 100% unfired by me. I haven't had the chance to buy mass quantities of ammo and hit the range.

Wow, if that appears to be metal shavings to you, I wonder what else you see.