I came up with this list while shopping for an EOTech riser. PM me if there's something missing. And post of photo of your setup!
Here is an excellent thread explaining co-witness methods. BUIS/Co-witness thread.
Bushnell Holosight 51 Specs
Bushnell Holosight 52 Specs (discontinued)
Having a primary optic with the capability to be quickly attached and detached from a weapon system, while still maintaining “on target” repeatability, provides a degree of tactical flexibility highly valued in urban combat. The rugged EOTech 551 or 552 holographic sights are excellent choices for a “red dot” optic. However up until now, adding some type of quick detach mechanism meant mounting the sight on some other mounting platform that raised the EOTech at least another 1/2" above the bore. Besides adversely affecting cheek weld, mounting the EOTech in this manner no longer allowed the shooter to co-witness the EOTech sight with the iron sights of the weapon system.
GG&G has developed a unique and innovative quick detach system that retrofits directly to the body of the EOTech. The new GG&G ACCUCAM QD Locking Lever System replaces the EOTech socket head screw or thumbnut attachment method. No other modifications are required. The ACCUCAM system installs in approximately ten minutes. The only tools required are a 7/64" allen wrench and a torx head wrench, both are included in the kit. This system fits new and existing EOTech sights that have the protective shroud and only adds 3 ounces. It is fully adjustable to fit Weaver and MIL-STD 1913 dovetails. Once installed on the EOTech the sight can be quickly installed on a dovetail rail in seconds by rotating the ACCUCAM Cam Lever to the locked position. It can then be quickly removed by rotating the ACCUCAM Cam Lever to the unlocked position. In tests, the ACCUCAM Locking Lever System has shown to be repeatable to less that 1/2 MOA. The unique finger loop design is easily operated, even with a gloved hand and the rounded design is ergonomic and virtually snag proof. Manufactured from solid billet 4140 steel and manganese phosphated black to mil spec, the new GG&G ACCUCAM QD Locking Lever System provides a solid, rugged quick detach system for your EOTech.
photo from CS Gunworks
Another mount designed by request. Our EO mount jacks the EO up by .275". This extra height sticks the irons low in the EO window...you can still see the irons if push-comes-to-shove. These are selling like candy. The extra height is just what the EO has been needing. The design had room for a piece-of-picatinny on the back, so we put it there and now you can mount a PVS-14 in perfect co-witness or either of the new magnifiers that EOTech and Aimpoint are coming out with.
Designed for FBI SWAT and HRT, the ideal tactical mount for your EOTech, places the dot just above the front sight post. With integral A2 rear sight.
More secure than the competition! This mount elevates your EOTech one quarter inch to give you a better sight picture. Now the iron sights will no longer obscure the EOTech reticle. Made from aircraft quality aluminum and hardcoated to military specifications.