AR15.Com Archives
 M4 feed ramps.
doorgunner  [Team Member]
9/21/2010 5:53:27 AM EST
I am going to replace the A2 upper on my 20-inch rifle, with a flat top upper. The barrel is a government profile, with a standard barrel extension. If I use an upper with M4 feed ramps, is it going to cause me any issues?
Paid Advertisement
--
boredelmo  [Member]
9/21/2010 5:56:48 AM EST
Yes and no.

It could mar the bullets or feed unreliability, or operate fine.

You could dremel the extension to fix it....or mess it up permanently depending on your skill set.

You could have a reputable smith do the work or send it to ADCO.

Like clockwork....this thread pops up once a week!
Frens  [Member]
9/21/2010 6:00:13 AM EST

MadnessReigns  [Member]
9/21/2010 6:05:39 AM EST
barrel extension with m4 ramps + upper without = ok

extension without + upper with = bad juju
doorgunner  [Team Member]
9/21/2010 6:06:25 AM EST
That's exactly the information that I needed. Thanks men.
Frens  [Member]
9/21/2010 6:21:27 AM EST
btw, since I'd like to do exactly the same...who makes a flat top receiver without M4 feedramps?

Originally Posted By doorgunner:
I am going to replace the A2 upper on my 20-inch rifle, with a flat top upper. The barrel is a government profile, with a standard barrel extension. If I use an upper with M4 feed ramps, is it going to cause me any issues?


grigri1  [Team Member]
9/21/2010 7:58:08 AM EST
Several are made. Mega makes them. I just bought a Cardinal forge one without M-4 ramps. Lots out there.
SSeric02  [Team Member]
9/21/2010 8:31:43 AM EST
Originally Posted By Frens:
btw, since I'd like to do exactly the same...who makes a flat top receiver without M4 feedramps?

Originally Posted By doorgunner:
I am going to replace the A2 upper on my 20-inch rifle, with a flat top upper. The barrel is a government profile, with a standard barrel extension. If I use an upper with M4 feed ramps, is it going to cause me any issues?




http://www.bravocompanyusa.com/Upper-Receiver-Assembly-Flat-Top-p/flat%20top%20upper1.htm
ccosby  [Team Member]
9/21/2010 1:50:39 PM EST
Originally Posted By Frens:
btw, since I'd like to do exactly the same...who makes a flat top receiver without M4 feedramps?

Originally Posted By doorgunner:
I am going to replace the A2 upper on my 20-inch rifle, with a flat top upper. The barrel is a government profile, with a standard barrel extension. If I use an upper with M4 feed ramps, is it going to cause me any issues?




Stag, larue, rainier arms, etc all sell them.
M4quadrail  [Member]
9/22/2010 3:58:51 PM EST


This! And I thought feedramp questionswere onlyallowed to be posted on MONDAYS! M4QUADRAIL
Paid Advertisement
--