Masterpiece Arms BA Scope Mount 20 MOA, 34MM, 1.250" High

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The Masterpiece Arms BA Scope Mount 20 MOA, 34MM, 1.250" High is made for mounting high performance optics onto bolt action rifles with Picatinny rail scope bases.

The mount is precision machined from 6061 T6 aluminum and finished in hard coat T3 Mil-Spec anodize. Horizontal split rings. The interface ensures positive engagement for both in spec and out of spec rail systems. Absolute Return to Zero via multiple locking lugs located on the bottom of the rail interface.

Recommended torque is 50 in lbs cross bolts and 20 in lbs on top cap screws.


The MPA mounting system features the following advantages:

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 1.060 (30mm & 1″), 1.125 & 1.250” (34mm) & 1.250 (35mm)
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

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 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
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. If yours is not listed, please use the guide to measure it to determine the mount size:


Step 1) You need a New Zealand Firearms Licence to purchase a firearm. If you don't have a licence then consider applying for one. More information available here.

Step 2) If you have a firearms licence then you can purchase any of the A Category firearms or receivers on our website. Follow the normal checkout procedure to finalise the transaction.

Step 3) Complete a police mail order form. You can download one here with all our details already filled in. You will need to fill in the Make, Model, Calibre sections of the form. You will also need to fill in your personal details. 

Step 4) Take the complete police mail order form to your local police station. They will then process the form and send us a signed copy.

Step 5) Once we receive the form, usually within 24 hours after you submit it, we send you the gun via The Firearm Dealer Network. We will email you tracking information so that you can see when the gun arrives at the firearm dealer for pickup.


You can also pick up the firearm from our shop during opening hours. Please checkout the Contact Us page for details on location and opening hours.

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