Works well on colt .22 tactical carbine - Command Arms Accessories Caa M16 / AR15 / M4 2 45 Degree Rail Mounts

Nice product overall. Bolts needed tightened down to make to contours match. Needed to "trim" the rails a bit to get the rings to fit. But overall seems very durable, light weight, and a nice add on for the money.
Pros: Light weight and durable.
Cons: Didn't fit contour of forearm, but worked well once bolts were tightened.

This review was written in the old system and had content requirements that are different than reviews written today.