The Flip Up Backup Iron Sights (BUIS) collection provides low-profile, rugged backup aiming solutions engineered to keep you on target if your primary optic fails or when a co-witnessing iron sight solution is preferred. Ideal for duty rifles, patrol carbines, competition rigs, and hunting setups that require redundancy, modern flip-up sights stow cleanly when not in use and deploy instantly with positive lockup when needed.

Available in a range of heights and mounting styles to work with red dots, magnifiers, and magnified scopes, these flip-up sights pair easily with Picatinny, M-LOK, and monolithic rail systems. Each sight is built to resist recoil, impact, and the elements—providing a dependable, zeroable iron-sight solution for real-world use.

Key Features

Low-Profile Folded Stowage
Sights fold flush to the rail to minimize snag and maintain a clean sightline when optics are primary.

Rapid One-Hand Deployment
Spring-assisted or positive-detent mechanisms allow quick, single-handed flip-up for immediate engagement.

Tool-Less Windage & Elevation Adjustment
Tactile, repeatable adjustments—many models allow field zeroing without special tools for quick returns to accuracy.

Co-Witness & Height Options
Available in absolute/lower 1/3-co-witness and various riser heights to match red dots, LPVOs, and magnifiers for consistent sight picture.

Robust Materials & Finishes
Machined aluminum or steel constructions with hard-anodized, nitride, or phosphate finishes for corrosion and wear resistance.

Positive Lock & Return-to-Zero
Secure locking detents prevent accidental collapse and ensure repeatable return-to-zero after deployment.

Ambidextrous / Tool-Free Mounting
Designed for easy installation on Picatinny rails; many offer M-LOK/QD adapter compatibility or reversible mounting options for left/right preference.

Slim, Lightweight Profiles
Engineered to add minimal mass and bulk—ideal for lightweight rifle builds and streamlined setups.

Multiple Use Cases
Ideal for patrol/duty rifles, competition backups, training rigs, and hunters who require a reliable backup should electronics fail.