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View Full Version : M4 "feed ramps"? Mega Upper?


Gary O
08-10-2006, 3:33 PM
I see uppers listed with M4 feed ramps. What does that mean in the Queens english? Is it a desirable feature.? I am considering a Mega upper; is this a quality piece? Thanks, Gary....

Ratters
08-10-2006, 3:44 PM
An M4 barrel has feed ramps built into it. An M4 reciever has little cutouts that feed these feed ramps. Nice to have, but not necessary. The gf has an M4 upper without the feed ramp cuts and hasn't had a single problem.

From what I understand, Mega makes good stuff. Are you looking just at an upper receiver or a complete upper?

Gary O
08-10-2006, 3:57 PM
I bought a Mega Gator lower from a member and it is finished very nicely. I was thinking an upper from Mega would match the finish; all thing being equal. I would like a complete upper set up "my way" but don't know of anyone useing a Mega upper in thier builds.

mr2.0
08-10-2006, 7:16 PM
I have Mega upper and lower, upper with M4 feedramp with M4 feed ramp barrel extension. Here is the pic:
http://calguns.net/calgunforum/showthread.php?t=37928

Ironballs
08-10-2006, 8:48 PM
I understood sharper slope to help feeding with shorter bbl setups that have less gas power (bolt not as far back, so less power to drive foward)?

PIRATE14
08-11-2006, 8:11 AM
Not all M4 style barrels have a M4 barrel extension.....

M4 barrel ext were developed to increase the reliability of feeding since the shorter carbines have an increased cyclic rate.

There are 10s of thousands of carbines w/o M4 feed ramps or barrel ext that work just fine.....

However, If I am making a custom build I usually recommend getting the M4 barrel ext cause it's only a couple dollars more and another piece that can actually increase the reliablity of feeding rounds in the chamber.

Jicko
08-11-2006, 1:14 PM
I have Mega upper and lower, upper with M4 feedramp with M4 feed ramp barrel extension. Here is the pic:
http://calguns.net/calgunforum/showthread.php?t=37928

I thought the MEGA marked upper do not have M4 feedramp!!! When did that get changed?

PIRATE14
08-11-2006, 1:19 PM
I thought the MEGA marked upper do not have M4 feedramp!!! When did that get changed?

Some come w/o ramps

Some come w/ ramps

TWO different types......nothing has changed.

Sugarfoot47
08-11-2006, 2:05 PM
I have a Bushy V-Match upper on my Registered Bushy lower w/ 16" M4 barrel. No ramps on the receiver and absolute reliability after 13 years of use. As stated earlier by Pirate 14, they were designed for the military full auto M4's to increase reliability and wouldn't really apply to our rifles. If your receiver doesn't have them, don't sweat it.

mltrading
08-11-2006, 3:05 PM
Some come w/o ramps

Some come w/ ramps

TWO different types......nothing has changed.


Add one more thing.

MEGA uppers are hard to get. Currently they are making their own charging handles. It makes the bad waiting time even worse.:(

MEGA uppers are in excellent quality.

xsquid
08-11-2006, 7:20 PM
google is your friend;

Rifle to M4 barrel comparison
http://www.adcofirearms.com/images/exts_front.jpg

Upper/barrel w/ M4 cuts
http://www.gandrtactical.com/images/archive/LMT%20M4%20Feed%20Ramps.jpg

DevLcL
08-11-2006, 7:55 PM
Nevermind, figured it out.