MPA BA Bolt Action Mount

FEATURES and BENEFITS

The MPA mounting system features the following advantages:

• 4 Accessory Mounting Locations on the left and right side of the mount body, in the front and back. The holes are on 20mm hole spacing, which works with other Unimount accessories.
• Extreme Bore Size consistency,  Roundness and Cylindricity with tolerances as low as 0.0002″
• Provides the ability to confidently move the optic/mount to multiple rifles with simple windage and elevation adjustments.
• Superior clamping surface to ensure maximum rail engagement.
• Lifetime warranty
• Rail to optic center is the size specified on the drop down menu.
• This mounting system is designed to handle large objectives up to 56mm.

This system provides over 3.5″ of rail interface providing extreme lockup on the host rifles scope base. Our NATO spec rail interface system pulls the mount onto the top of the pic rail, providing over 200% more rail contact than other competitive mounting systems that pinch the rail.

Specifications:

• Overall Length: 4.840″
• Overall Weight: 6.9 oz
• Open Gap between Rings: 2.700″
• Ring Width: 1.070″
• Ring Heights: 1.060, 1.125, 1.250, 1.500
• Material Type: 6061 Aluminum
• Surface Coating: Black Anodized
• Top Cap Torque: 15-20 inch lbs
• Cross Bolt Torque: 60 inch lbs
• Accessory Thread Pitch – M5
• Accessory Hole Spacing – 20mm

To determine the height needed for  your specific optic, follow this method:

Using a Caliper, measure the distance from the bottom of the erector housing to the main tube on your optic as shown in the picture below:

Here is the measurement chart to determine which minimum height is needed:

1.060″ Height – Erector Housing to main tube measurement of 0.145″ or shorter.

1.125″ Height – Erector Housing to main tube measurement of 0.210″ or shorter

1.250″ Height – Erector Housing to main tube measurement of 0.330″ or shorter

1.500″ Height – Erector Housing to main tube measurement of 0.580″ or shorter

Clip on Thermal or Night Vision optics, which attach to the front Night Vision Bridge or Rail,  Typically require at 1.500″ tall mount. 

Please note, if you have a chassis that has a full length handguard from the action through the end of the fore-end, you will need to go with a taller mount to clear the rail. Otherwise, your objective will most likely contact the rail. If you have any questions about fitment to a specific chassis and your optic, please email [email protected]

If you dont have your optic yet, here is a good reference guide for most popular optics and the ring size/height needed:

• Burris XTR-II – 1.060″ Height or taller
• Bushnell Elite Tactical 34mm (all) – 1.060 Height or taller
• Bushnell Elite Tactical 30mm (all) – 1.060 Height or taller
• Kahles 34mm – 1.125 Height or taller
• Vortex PST Gen II 5-25×50 – 30mm 1.060 Height or taller
• Vortex Strike Eagle 5-25×56 – 34mm 1.125 Height or taller
• Vortex Razor HD 5-20 – 35mm x 1.250 or taller
• Vortex Razor Gen II & Gen III HD – 34mm x 1.125 Height or taller
• Schmidt/Bender 34mm – 1.250 Height or taller
• Leupold Mark 8 – 35mm – 1.250 Height or taller
• Leupold Mark 5HD – 35mm 1.125 Height or taller
• NightForce ATACR – 34mm 1.125 Height or taller
• Zero Compromise ZC527 & ZC420 – 36mm 1.125 or taller
• USO FDN25X – 34mm – 1.125 or taller
• Tangent Theta Professional – 34mm 1.125 or taller
• Arken EP5 – 34mm, 1.500, 0MOA (This optic has a knob on the bottom of the erector housing which requires a taller ring height on a unimount).

For 20MOA Mounts, please go 1 size higher on the ring height to allow for the downward cant of the objective tube towards to barrel – to ensure  your objective will clear the barrel or rail.