just wondering,what is the difference between uppers with m4 feed ramps and a regular uppers ?
Posted: 5/25/2010 5:59:23 PM EDT
[#1]
IIRC, an M4 upper has ramps cut into it that line up with the feed ramp on the barrel extension, while an M16 upper does not. So, with an M4 upper, you get a longer, earlier starting, feed ramp.
