Osight Picatinny Mount OSP-157, 1.57" Height for Osight X and RMR Footprint Optics

Osight Picatinny Mount OSP-157, 1.57" Height for Osight X and RMR Footprint Optics

The Osight OSP-157 Picatinny Mount is a precision-engineered mounting solution designed to securely attach your Osight X or compatible RMR footprint optics to any standard Picatinny rail. Built with premium materials and optimized for proper co-witness height, this mount delivers durability, stability, and performance for rifle and carbine setups.

Why Choose the OSP-157 Mount?

A quality optic deserves a rock-solid mount. The OSP-157 is designed to provide a stable interface between your optic and firearm, ensuring consistent zero retention and reliable performance under recoil. Its 1.57" optical center height delivers a lower 1/3 co-witness with AR-style iron sights, making it ideal for modern sporting rifles.

Key Features

• 1.57" Optical Center Height: Provides a lower 1/3 co-witness with standard AR-15 iron sights, allowing for a clean sight picture while maintaining backup sight alignment.
• 7075-T6 Aluminum Construction: Built from high-strength aerospace-grade aluminum with a steel-reinforced base for enhanced durability and long-term reliability.
• Dual Cross-Bolt Clamping System: Two robust cross-bolts deliver superior clamping force, ensuring the mount stays firmly secured to your Picatinny rail even under heavy recoil.
• Compact and Rugged Design: Slim profile minimizes added bulk while maintaining structural strength, making it suitable for both duty and range rifles.
• Wide Compatibility: Designed for Osight X and other optics using the RMR / 407C / 507C footprint. Not compatible with Osight S models.

Built for Rifle Applications

The OSP-157 is ideal for shooters running red dot optics on AR-platform rifles, pistol caliber carbines, or other Picatinny-equipped firearms. Whether you're setting up a defensive rifle, training platform, or competition build, this mount ensures your optic remains secure and properly aligned.

Ideal Use Cases

• AR-15 and AR-style rifles
• Pistol caliber carbines (PCC)
• Home defense rifle setups
• Range training and tactical drills

Technical Specifications

• Optical Center Height: 1.57 inches
• Material: 7075-T6 Aluminum with Steel Reinforced Base
• Weight: 65g (2.29 oz)
• Dimensions: 1.94" L x 1.20" W x 1.13" H
• Mount Type: Picatinny Rail
• Footprint Compatibility: RMR / 407C / 507C

What's Included

• OSP-157 Picatinny Mount (Matte Black)
• M3.5 x 8.5mm T10 Torx Screws (x3)
• M3.5 x 11mm T10 Torx Screws (x3)
• T25 L-Shaped Allen Wrench
• Osight Screw Tool

Frequently Asked Questions

Q: What does lower 1/3 co-witness mean?
A: It means your iron sights sit in the lower third of the optic window, allowing a clear primary sight picture while keeping backup sights available if needed.

Q: Will this mount fit my optic?
A: This mount is compatible with optics using the RMR, 407C, or 507C footprint, including the Osight X. It is not compatible with Osight S.

Q: Is this mount suitable for heavy recoil?
A: Yes. The dual cross-bolt design and steel-reinforced base provide strong clamping force and excellent durability under recoil.

Q: Can I use this on any Picatinny rail?
A: Yes. The mount is designed to fit standard Picatinny rails found on most modern rifles and carbines.

California Proposition 65 Warning

WARNING: This product can expose you to chemicals including lead, which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information, go to www.P65Warnings.ca.gov.