I'm getting ready to send a RRA CAR A4 Hbar upper to ADCO for reprofiling and am trying to think
of any other things they can take care of such as properly staking the carrier key and the question of feed ramps
came to mind. I'm not sure the feed ramps are M4, rather they appear dremmeled, semi M4. The CAR
runs flawlessly as is with XM193and in a hundred + rounds has never had any issues.
Should I leave well enough alone or tell them to cut boni fide M4 ramps in. I wouldn't trust this procedure to any
local hacks but ADCO I do trust to upgrade something that ain't broke.
While they have it I would have them check the ramps and clean them up if needed.