Fortis F1 Optic Mnt Lower 1/3 Co-wit

The Fortis F1 Optic Mount Lower 1/3 Co-witness is a lightweight, low-profile mounting solution designed for Aimpoint Micro H1/H2, T1/T2, and Vortex Sparc II optics on AR-pattern rifles. At just 1.3 ounces, this forward-extending design reduces sight radius while maintaining a co-witness sight picture with backup iron sights, giving shooters redundancy without sacrificing sight radius efficiency. The mount secures directly to any MIL-STD-1913 Picatinny rail using two slotted machine screws, requiring no additional hardware or modifications.

The lower 1/3 co-witness height positions the optic's center axis one-third of the way up the receiver's flat-top, aligning with the sighting plane of standard rifle iron sights. This geometry allows simultaneous use of backup sights while keeping the primary optic in the shooter's primary line of sight. The forward-extending design delivers faster target acquisition by moving the optic further forward on the upper receiver, reducing effective sight radius and improving field of view consistency across different eye positions. Compact dimensions of 2.5 x 2.45 x 4.75 inches keep the footprint minimal while supporting optics up to the specified weight limit.

This mount serves operators, LEOs, and serious shooters who require redundant sighting systems for duty rifles, precision carbines, or tactical setups where co-witness capability is critical. The lower 1/3 height is standard-issue specification across military and law enforcement platforms, making it ideal for builds that mirror duty rifle ergonomics or those requiring interchangeability across multiple platforms. Competitive shooters and precision marksmen also favor this configuration for the balance between optic performance and backup sight reliability in three-gun or precision rifle competitions.