Congrats on the MR556! When I got both 10" and the 14" rail for my upper and they both fit pretty tight. I personally clean mine every few hundred rounds and use a rubber mallet to remove the rail....
Liked On: 10-05-2019, 11:04 AM
https://i.imgur.com/951Q38v.jpg HK MR556 SBR (10" upper being serviced) HK USC to UMP SBR HK Umarerx 416 .22lr
Liked On: 10-04-2019, 12:01 PM