TACFUN FSI Reflex Red/Green Dot Sight w/4 Reticles Metal Scope Black FIELD SPORT BRAND NEW,High quality, Expedited Shipping, Fog proof and shock-resistant housing Nitrogen charged with weather resistant seals. Coated lens provides superior light transmission, resolution and scratch resistance. Dual-illuminated (Red, Green) reticles with adjustable rheostat for brightness control 4 different reticle patterns provide variety for any target type. Nitrogen charged with weather resistant seals. Coated lens provides superior light transmission. resolution and scratch resistance Integrated Picatinny / Weaver mounting system , Unlimited eye relief for quick target acquisition Length: 3" Weight: 4 oz.