I have an ARMS 19A mount, it's NEW never mounted but out of the sealed bag, $120 + shipping. The following is the specs:
The universal platform which combines the NATO STANAG and the MIL-STD. 1913 Rail. Ideal for scopes, holographic sights, day and night vision optics and lasers. Throw lever convenience and repeatability.
Aluminum base secured by steel feet & levers with A.R.M.S.® no-mar patented Buffer Pads. Interfaces to M16 A1 / A2, M4, also Stinger & AT-4 when M16 mount is used in the AT-4 & Stinger Brackets. Provides universal platform, which is the Nato STANAG and Weaver standards combined for many Day and Night Vision optics & lasers. Guaranteed Repeat Zero Hold.
Email me if you want pics. thanks for looking !