The Ultimate Guide to the SMOOTHEST 9mm Upper!

Can this 9mm upper be used with a standard AR-15 Lower?

Yes, it is compatible with any standard AR-15 Lower.

What type of ammo is recommended for optimal performance?

Full power 124 grain ammo is recommended for increased bolt rearward movement and improved accuracy.

Are there customization options available for barrel lengths?

Yes, there is a variety of barrel lengths available for personalized setup.

How is heat transfer managed during operation?

The gun showcases minimal heat transfer, especially towards the front of the handguard, ensuring phenomenal performance.

Who provided the gun for review and demonstration?

Mean Arms provided the gun for review, showcasing a demonstration of running a magazine with subsonic ammo.

What scopes are recommended for use with this 9mm upper?

Gideon Optics scopes are praised for their affordability and aesthetics, making them a great choice for enhancing your shooting experience.

How can short stroke issues with full power ammo be addressed?

Using an H1 buffer instead of H2 can enhance bolt travel and mitigate short stroke issues with different ammo weights.

Is the gun capable of feeding steel case ammo without overheating?

Yes, the gun successfully feeds steel case ammo without overheating, ensuring reliable performance during extended shooting sessions.

What is the recommended approach for tuning the gun for optimal performance?

Tuning may be required to push the bolt back far enough for the last round bolt hold open functionality. Consult with a gunsmith for expert assistance.

Can the 9mm upper be customized with additional accessories?

Yes, the 9mm upper offers customization options for adding accessories such as scopes, handguards, and grips to enhance your shooting experience.