Overview A compact, extended riserstyle scope mount base designed to give a longer 145MM mounting platform while maintaining compatibility with standard 20MM Picatinny/Weaver (P/W) rails. This 20MMto20MM P Rail Riser raises and extends your mounting surface to improve clearance, alignment, and accessory placement without changing rail type. Key benefits — why you need it Adds length and elevation where a standard rail is too short or too low, solving scope clearance or interference problems. Keeps your setup on a familiar 20MM Picatinny/Weaver standard so existing mounts, rings, and accessories remain compatible. Creates a stable, extended platform for optics, red dots, magnifiers, backup sights, or other railmounted devices when original rail space is limited. What it does Extends an existing 20MM rail by 145MM of additional mounting surface. Acts as a riser to increase height above the host rail for improved cheek weld, clearance over iron sights, or cowitness adjustment. Interfaces directly with 20MM (Picatinny/Weaver) rails on both the host and the elevated platform (20MM to 20MM). Key attributes Length: 145MM extended mounting surface. Compatibility: Designed for 20MM Picatinny/Weaver (P/W) rails — mounts 20MM to 20MM. Form: Riser / extended base style to provide added elevation and reach. Functionality: Provides a longer, elevated Prail section for optics and accessories without changing rail standard. Performance: Intended to create a consistent, repeatable mounting platform for optics and accessories on 20MM rails. Use cases / applications Hunting and field use: Raise a scope for proper cheek weld and clearances over iron sights, gas blocks, or lowprofile receivers while keeping standard 20MM mounting compatibility. Target and range setups: Extend the available rail length to mount both scope and backup sighting systems, enabling better eye relief and accessory spacing. Tactical, airsoft, and training rigs: Add elevation and length to a base rail to accommodate magnifiers, offset sights, lights, or lasers in a single, consistent platform. User tips Verify your existing rail is a 20MM Picatinny/Weaver (P/W) standard before installation. Check eye relief and sight alignment after mounting to confirm comfort and performance. Use appropriate torque and secure mounting hardware to ensure a stable installation. What this product is not This item is an extended 145MM 20MMto20MM P/W rail riser. It does not convert to other rail widths or standards and is not a complete scope ring set or optical device by itself. Compatibility checklist Mounts to and provides a 20MM Picatinny/Weaver (P/W) rail surface. Intended to be used where an extended, elevated 20MM rail section is required. Clear, simple solution for limited rail space When you need extra rail length or height but want to keep the proven 20MM Picatinny/Weaver interface, this 145MM extended P rail riser gives you a predictable, extended mounting surface for optics and accessories while maintaining compatibility across your existing 20MM gear.