Fortis Manufacturing, Inc., F1, Black, Fits Aimpoint Micro T-2, Holosun HE403, Primary Arms Advanced Micro Dot, Sig Sauer Romeo4T WARNING: This product can expose you to chemicals including arsenic, which is known to the State of California to cause cancer. For more information, go to www.P65Warnings.ca.gov One Piece Billet Design Slotted Screws Attachment Aircraft Grade 6061-T6 Aluminum Military Specification Type III Hard Coat Anodized Height: 0.955" Light weight 1.3oz Lower 1/3 witness Aimpoint Micro T-2, H-2, T-1, H-1, & Aimpoint CompM5, Vortex Crossfire & Sparc II, Sig ROMEO4 (H/S/T) & ROMEO5, Primary Arms Micro, Holosun Micro Made in the USA! Fortis F1 Optics Mount is designed to work in conjunction with Aimpoint's popular Micro H1/H2, T1/T12 as well as the Vortex Sparc II series optics. The F1 Optics Mount is designed to attach to your flat top upper receiver. Its lightweight low-profile is one of the lightest designs out there at 1.3oz. The Fortis F1 Optics Mount features an innovative design by extending the optic forward for faster target acquisition. It secures to any MIL-STD-1913 Picatinny Rail with two slotted machine screws. Offering a lower 1/3rd to your back up iron sights for a larger field of view.