AR15.Com Archives
 M4 feed ramps.
doorgunner  [Team Member]
9/21/2010 10:53:27 AM
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?
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boredelmo  [Member]
9/21/2010 10:56:48 AM
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 11:00:13 AM

MadnessReigns  [Member]
9/21/2010 11:05:39 AM
barrel extension with m4 ramps + upper without = ok

extension without + upper with = bad juju
doorgunner  [Team Member]
9/21/2010 11:06:25 AM
That's exactly the information that I needed. Thanks men.
Frens  [Member]
9/21/2010 11:21:27 AM
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 12:58:08 PM
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 1:31:43 PM
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 6:50:39 PM
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 8:58:51 PM


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