FCD likes the Glock MOS concept, even if they find the factory MOS adapter plates could use some help. Standards, commonality, availability of parts are all good things. Heretofore, users have had to send in their slides to be milled to accept mini red dot sights or opt for 3rd party optics ready slides. The time it takes to send in the slides to be milled, and varying quality of the milling work and optics ready slides notwithstanding, there was a lack a standard regarding the sight height, it’d be a coincidence if two slides milled by two different shops share the same sight height. Glock’s MOS may not sit as low as some, but in our opinion, what MOS offers more than makes up for it, namely a uniform sight height, ease of installation, parts commonality, and availability.

OPF-G, ACRO is identical to the Tangodown AAM-01. Based on the success of the OPF-G, RMR, FCD had been asked to develop a Glock MOS compatible plate for the superb Aimpoint ACRO. FCD saw and tested what their friends at Tangodown have already made, and determined AAM-01 is exactly how they would have done it and there was nothing FCD could have done better, there is therefore no reason to create another one just like it under FCD’s name. FCD does not like rebranding but does make exceptions when the products in question are outstanding. FCD has known Tangodown and its folks for a long time, they carry Tangodown products and are proud to be able to put their logo on the AAM-01 and make it OPF-G, ACRO.

OPF-G, ACRO is machined in 4140 steel and Melonite coated. For a short time, OPF-G, ACRO will have both our Cygnus logo, and Tangodown’s logo in tandem.

Proudly designed and made in the USA.