BA Bolt Action Mount

The MPA mounting system features the following advantages:

• 4 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 within +/- .0002″
• Roundness and cylindricity of bore within .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
• Length 4.760″
• Weight 6.8 oz
• 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 (34mm Mount) and 50mm (30mm Mount).

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.

For proper selection of the correct mount, see the data below to match the proper MPA BA Mount to your optic:

• MPA BA 1.060″ Height – Erector Housing to main tube measurement of 0.145″ or shorter.
• MPA BA  1.125″ Height – Erector Housing to main tube measurement of 0.210″ or shorter
• MPA BA  1.250 Height – Erector Housing to main tube measurement of 0.330″ or shorter

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 us.

Note: For US Optic Model ER-25, please select the 1.250″ height for your optic. This is due to the erector housing width and configuration and necessary clearances required for proper fit. Also, please notify MPA if this is the optic you plan on using. A special top cap is required to clear the elevation turret cap.

• Burris XTR-II – 1.060″ Height
• Bushnell Elite Tactical 34mm (all) – 1.060 Height
• Bushnell Elite Tactical 30mm (all) – 1.060 Height
• Khales 34mm – 1.125 Height
• US Optic ER-25 – 1.250 Height
• Vortex PST Gen II 5-25×50 30mm 1.060 Height
• Vortex Strike Eagle 5-25×56 34mm 1.125 Height
• Vortex Razor HD 5-20  35mm x 1.250
• Vortex Razor Gen II HD 4.5-27 – 34mm x 1.125 Height
• Schmidt/Bender 34mm – 1.250 Height
• Leupold Mark 8 – 35mm 1.250 Height
• Leupold Mark 5HD – 35mm 1.125 Height
• NightForce ATACR 5-25 – 34mm 1.125 Height
• Zero Compromise ZC527 & ZC420 – 36mm 1.125 or 1.250

This list is not comprehensive – it’s a guide for some of the more popular scopes.