From A.R.M.S.:

This mount features the A.R.M.S.®/SWAN ® Universal mounting platform, accepting NATO STANAG and Weaver type scopes and rings. It attaches via a unique self-locking thumbnut that fits snugly in the hole in the carry handle for continuous zero hold. The #02™ carry handle mount features a wide angle TV shaped see-thru channel for use with iron sights.

Also fits detachable carry handle models.

Weight - 2.6 oz
Length: Approx. 5"