Ian's Frankengun for Moons Out

Published on December 10, 2025
Duration: 17:10

This guide details the installation of the Lage MAX-11/15 upper receiver, a modification that transforms a Mac-11 or Mac-10 pistol into a rifle-style firearm. Expert Ian McCollum emphasizes the importance of adhering to ATF regulations to ensure the firearm remains compliant. The process involves attaching the upper receiver to a registered machine gun lower, ensuring proper function, and confirming it cannot be fired independently.

Quick Summary

Expert Ian McCollum's "Frankengun" build for the Moons Out match features the Lage MAX-11/15 upper receiver, converting a Mac-11/10 into a rifle. Key accessories include a BLK LBL bipod, Spuhr mount, Aimpoint Comp M4, B.E. Meyers MAWL-C1+, and PTR Vent 3 suppressor, all adhering to strict ATF regulations.

Chapters

  1. 00:00Introduction: Moons Out "Frankengun" Build
  2. 00:31Lage MAX-11/15 Upper Receiver Explained
  3. 01:28History of Lage Conversions
  4. 02:415.56 Conversion Mechanics
  5. 03:59Legal Considerations for Conversions
  6. 05:48BLK LBL Bipod Handguard
  7. 06:21Optic Setup: Spuhr B.A.M. and Aimpoint
  8. 07:25B.E. Meyers MAWL-C1+ IR/Visible Laser
  9. 11:46DBAL-A2 Comparison
  10. 13:59PTR Vent 3 Suppressor
  11. 16:23Closing Remarks

Frequently Asked Questions

What is the Lage MAX-11/15 upper receiver?

The Lage MAX-11/15 upper receiver is a component that converts a Mac-11 or Mac-10 machine pistol into a more practical rifle-style firearm. It uses an AR-15 style bolt and direct impingement gas system while maintaining the original open-bolt operation of the Mac lower.

What are the key accessories on Ian McCollum's "Frankengun" build?

The build features a BLK LBL handguard with an integrated bipod, a Spuhr B.A.M. mount with an Aimpoint Comp M4 optic, and a B.E. Meyers MAWL-C1+ IR/Visible laser. A PTR Vent 3 suppressor is also included.

What are the legal considerations for firearm conversions like the MAX-11/15?

According to expert Ian McCollum, ATF regulations require that such upper receivers cannot function as a machine gun independently. They must be designed to require a registered machine gun lower receiver to operate, ensuring compliance with NFA rules.

How does the PTR Vent 3 suppressor perform?

The PTR Vent 3 is a 3D-printed titanium, full-auto rated flow-through suppressor. While effective, it can reach high temperatures, even glowing red, after sustained full-auto fire, indicating its performance limits under extreme conditions.

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