05-20-2011, 03:55 AM
+1 pm LRRPF52's comments.
I've got one Grendel with std feed ramps, and across about ten cprod mags, reloads, wolf, hornady, never have see a feeding problem. So the std ramp upper is a viable option.
Whoever built your rifle should never have mismatched them.
I've got one Grendel with std feed ramps, and across about ten cprod mags, reloads, wolf, hornady, never have see a feeding problem. So the std ramp upper is a viable option.
Whoever built your rifle should never have mismatched them.

