For firearms with limited rail space or raised rails, the HTA MULTI base offers shooters a simple and compact method for installing back up iron sights. These bases will allow you to install nearly any Glock compatible iron sights (G17, 19, 22, etc.) directly onto a picatinny rail and only take up a few rail slots to accomplish it. With suppressor height sights, you'll be able to co-witness in the lower third of red dots like the RMR, Vortex Venom, AimPoint T2/H2, Burris Fastfire, etc. Just as importantly, you'll be able to select the type of sight you want to use, whether it's adjustable tritium night sights or very affordable OEM polymer sights.
The applications and advantages for this type of low-profile, modular system are countless. Notably, this design is highly compact, conserving precious rail space for optics on short railed firearms like the PS90 tri-rail and the Steyr AUG, which may not have enough room for full size flip up sights. Firearms that must be held like a traditional pistol, such as the Keltec P50, CZ Scorpion, and AR-15 pistols can also benefit from these sights, as peep/aperture sights may not be practical with arm's length eye relief. The ultra low profile of our MULTI Base puts them at a more natural height on firearms with traditional drop comb stocks like shotguns and also keeps the sight height over the bore axis to a minimum. This in turn means these sights hold elevation more consistently across various distances, especially at close range, than taller BUIS systems.
When piggybacked onto sights and scopes without the ability to cowitness, our bases provide an easy to acquire close quarters point of aim even if the optic itself has too much magnification, has stopped functioning, or the reticle is not visible due to lighting or lens obstruction. Furthermore, in home defense applications, conditions like close quarters and low light may make the speed and easy acquisition of illuminated pistol night sights more desirable than aperture or optical sights; tritium night sights are always on, don't require batteries, and don't have any buttons or dials to fumble with.
These are made in the USA from 4140 steel and finished with a black nitride treatment for corrosion resistance. A Glock front sight tool and pistol sight pusher tool are recommended for installation and zeroing of the sights. To simplify installation when using a pusher tool or vice, a 3D printed jig which the rear MULTI Base can be clamped to is available in the options. A minimum height of about 1" above the cheek rest (if any) is required for proper line of sight. For help with sight selection and zeroing, check out our blog article
Note: The most current HTA 90/22 model already includes a cut in the aluminum rail that allows for Glock sights to be installed. This item will not be needed on newer models and is intended for other firearms that require very compact sights. Some early model 90/22's also may not have the necessary cuts in the rail.
*Glock sights not included. 5/64" hex key is required for installation.