08-02-2018, 02:39 AM
Grendel benefits from M4 ramps and receiver cut, which is already present on most uppers and extensions nowadays.
Most people getting into ARs don't even know there was the original M16 upper and extension.
The Colt 727 (M16A2 Carbine) introduced the lowered feed ramps to deal with full auto and M855 as a band-aid for excess cyclic rate.
You don't really need it in 5.56 AR15s, but it is helpful for feeding Grendel. I seem to remember Bill A. commenting on it way back.
Most people getting into ARs don't even know there was the original M16 upper and extension.
The Colt 727 (M16A2 Carbine) introduced the lowered feed ramps to deal with full auto and M855 as a band-aid for excess cyclic rate.
You don't really need it in 5.56 AR15s, but it is helpful for feeding Grendel. I seem to remember Bill A. commenting on it way back.
NRA Basic, Pistol, Rifle, Shotgun, RSO
CCW, CQM, DM, Long Range Rifle Instructor
6.5 Grendel Reloading Handbooks & chamber brushes can be found here:
www.AR15buildbox.com
CCW, CQM, DM, Long Range Rifle Instructor
6.5 Grendel Reloading Handbooks & chamber brushes can be found here:
www.AR15buildbox.com