The A.R.M.S. #38 Swan Sleeve Std Optic Mounting System is a purpose-built accessory that adds a rigid, extended Picatinny platform to your rifle while preserving the integrity of the factory dovetail rail. Machined from aluminum and finished in black, it raises the rail by approximately 1/2 inch to provide a more comfortable optic height and secure mounting surface for a variety of sights and accessories.

This sleeve is sized to match the length of the receiver, creating a clean, continuous top rail that supports consistent eye alignment and repeatable zero. The integrated rear sight is designed to lean back and fold in the correct direction if the rifle is dropped, helping maintain zero and extending service life. Ideal for range use, training, and general-purpose shooting setups where dependable optics mounting is critical, it reflects A.R.M.S.’ reputation for precise machining and thoughtful firearm accessory design.

• Manufacturer: A.R.M.S.
• Model: #38 Swan Sleeve Std Optic Mounting System
• Color: Black
• Material: Aluminum
• Unique Features: Raises rail by 1/2" and protects rifle dovetail rail; receiver-length sleeve with folding rear sight designed to maintain zero