The SWMINIB-2 is designed with the DOCTER/NOBLEX foot print to directly attach to the Vortex Venom, Vortex Viper and Burris FastFire1, 2, 3 and 4 series Micro red dot sights. No Picatinny adapter required. Is not compatible with the Burris Fastfire C. We have designed and manufactured what we believe to be the lowest and sleekest direct attach mount for Micro and Mini red dot sights. It is SUPER LOW PROFILE. Direct mount means no need for the additional height and hardware of a Picatinny mounting attachment. With a height of .150″ it is one of the lowest in the industry. It has been moved forward, for more clearance around the hammer area . Note the attention to details, sculpting blending and radiusing for the absolute cleanest look around. It is made from 6061-T6 aluminum and anodized Black. With a weight of. 4 ounces it adds virtually nothing to the weight of the rev. It comes with the required screws for mounting on all factory drilled and tapped for a scope mount S&W Rev