Both of these are Picatinny rail mounts made for rifles, but they are built for different heights and different optics. The Arisaka Defense Aimpoint Micro Mount Mk2 is an extra high mount with an item height of 2.26 in, made from black aluminum and designed specifically for the Aimpoint Micro line.
The Trijicon RMRcc Low Mount Q-LOC sits much lower, with an item height of 0.94 in, an item width of 1.84 in, and an item length of 1.78 in. It is listed for use on pistols, rifles, and shotguns, and it comes with a limited lifetime warranty from Trijicon.
Spec for spec
SpecArisaka Aimpoint Micro MountTrijicon RMRcc Low Mount
ColorBlackBlack
For Gun TypeRiflePistol, Rifle, Shotgun
Country of OriginUnited StatesUnited States
Item Height2.26 in0.94 in
MountingPicatinnyPicatinny
Mounting LocationRailRail
Ring HeightExtra HighLow
Sport/ActivityShootingShooting

