Stern Defense MAG-AD9 9mm AR Conversion Kit

Published on December 1, 2017
Duration: 25:15

The Stern Defense MAG-AD9 9mm AR conversion kit transforms a standard AR-15 lower into a reliable pistol caliber carbine. It allows the use of Glock magazines and features its own ejector and bolt hold-open mechanism. Testing showed excellent reliability with various ammunition types and high-capacity magazines, even with a suppressor attached.

Quick Summary

The Stern Defense MAG-AD9 kit reliably converts an AR-15 lower to accept Glock 9mm or .40 S&W magazines. It features a last-round bolt hold-open and demonstrated flawless reliability with various ammunition and high-capacity magazines during testing.

Chapters

  1. 00:00Introduction & Baseline Rifle
  2. 01:48Stern Defense Kit Overview
  3. 03:31Installation Process
  4. 05:16Upper and Bolt Details
  5. 06:21Range Testing: Unsuppressed
  6. 08:34Suppressed Testing & Optics Issues
  7. 11:13Utility and Ammo Costs
  8. 13:14Reliability and High Capacity Mags
  9. 16:41Internal Inspection and Compatibility
  10. 20:31Final Thoughts

Frequently Asked Questions

What is the Stern Defense MAG-AD9 kit?

The Stern Defense MAG-AD9 is a conversion kit that allows a standard AR-15 lower receiver to fire 9mm or .40 S&W ammunition using Glock magazines. It includes a mag well adapter and a dedicated 9mm bolt carrier group.

How reliable is the Stern Defense MAG-AD9 conversion kit?

The kit demonstrated high reliability during testing, functioning flawlessly with various ammunition types and high-capacity Glock magazines, including 33-round and 50-round drum magazines.

What are the benefits of converting an AR-15 to 9mm with the MAG-AD9 kit?

Converting to 9mm offers advantages like compatibility with indoor ranges, lower ammunition costs compared to .223/5.56, and a softer recoil impulse, making it suitable for training and plinking.

Does the Stern Defense MAG-AD9 kit support last-round bolt hold-open?

Yes, the MAG-AD9 kit features an integrated last-round bolt hold-open mechanism that functions correctly when used with compatible Glock magazines.

Related News

All News →

More Reviews Videos You Might Like

More from Military Arms Channel

View all →