Made for a2 carry handles but can be fitted to an a1 - Precision Reflex PRI M16/AR15 Carry Handle Mount

While the description doesn't mention it, it's clear to me that this mount is made to fit an A2 carry handle. The instructions included with the mount show an A2 carry handle and as received, it did not fit my A1 style upper receiver. When the mounting screw was inserted, the nose of the mount pitched upwards out of line. The mount could be rocked back and forth. This wasn't a surprise as I have encountered the issue before and am aware that the sight trough of the A1 carry handle has a different contour than the A2. With careful hand fitting I was able to get the mount to sit flat in the carry handle's sight trough. It appears to be a secure and solid mount. I'll be mounting an old-school Trijicon Reflex on it once I modify the mount to lower the sight; this will allow at least a lower 1/3 cowitness.

I recommend this mount for anyone looking to mount a cowitness RDS or reflex sight on an A2. A1 folks, I recommend it also but be aware you'll have to do a little hand fitting. Go slow, use Dykem as you remove material and you can make it fit just fine.