The problem the Setback targets is specific: compact tactical riflescopes offer weight and handling advantages, but their shorter main tube length restricts mounting position flexibility. Standard mounts typically push optics forward, which can place compact scopes too far ahead for proper eye relief. The Setback allows positioning the scope rearward, moving the mounting point up to 3 inches to achieve a full field of view and comfortable shooting position without reducing rail engagement or mounting security.

The mount is a one-piece design with a narrow ring gap of less than 2.5 inches, engineered specifically for compact scopes with limited mounting surface area. It accommodates 30mm main tube riflescopes and maintains zero return under recoil and field conditions. The finish is hard-anodized matte black.

The $89.99 MSRP positions this as a budget option in a market where premium scope mounts regularly exceed $4-500. For shooters assembling compact scope systems, an extension mount at this price point should offer meaningful cost containment when building out complete optic packages.

GPO SetBack 3” Cantilever Extension Mount specs:

• Adjustment: Up to 3″ rearward or forward
• Tube diameter: 30mm
• Material: Aircraft-grade aluminum, one-piece construction
• Ring gap: Less than 2.5″
• Fasteners: Four hardened steel Allen-head cross-bolts
• Rail compatibility: Mil-Std 1913 Picatinny
• Finish: Hard-anodized matte black
• Warranty: Lifetime

Check out the news here: https://gpo-usa.com/shop/accessories/setback-3-extension-mount/ 

Have you dealt with eye relief problems on compact scopes, and does a solution like this change how you’d approach that platform?