Fortis F1 Optics Mount - Lower Third 1/3 Co-Witness

Name: Fortis F1 Optics Mount - Lower Third 1/3 Co-Witness
Brand: Fortis Manufacturing

Fortis Manufacturing · Mounts & Rings

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$71.95at Dirty Bird

Sale checked Nov 10, 2026

Buy at Dirty Bird

Where to buy

Store	Price	Availability	Buy	Add to build
Dirty Bird	$71.95Salechecked Nov 10, 2026	Check store	Buy at Dirty Bird

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Price history

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Dashed line = out of stock. Tracking since Oct 28, 2026.

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Store	Latest	Lowest	Highest
Dirty Bird	$71.95	$71.95	$71.95

Since Oct 28, 2026.

About this part

The Fortis F1 Optics Mount - Lower Third 1/3 Co-Witness is an optic mount from Fortis Manufacturing. One store lists it, Dirty Bird at $71.95.

Specifications

Manufacturer: Fortis Manufacturing
Type: Red Dot Mount
Co-witness: Lower 1/3

From the manufacturer

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 1/3 rd to your back up iron sights for a larger field of view. **Will work in conjunction with 3x magnifiers. Features: One Piece Billet Design Slotted Screws Attachment Aircraft Grade 6061-T6 Aluminum Military Specification Type III Hard Coat Anodized Logo on both sides Light weight 1.3oz Lower 1/3 witness Made in the USA!