How to Install AR MAGLOCK KingPin on Your AR-15

If you live in a restrictive state like California, owning an AR-15 requires careful compliance with local firearm laws—especially those concerning fixed magazines. The AR MAGLOCK KingPin combination offers one of the best solutions for keeping your rifle compliant without sacrificing function or usability. But to get the most out of this setup, proper installation is essential.

Here’s a step-by-step guide on how to install the AR MAGLOCK KingPin on your AR-15.

What You’ll Need

Before you begin, gather these tools and components:

• AR-15 rifle (compatible lower receiver)

• AR MAGLOCK system (Gen 2, 3, or 4)

• KingPin rear takedown pin

• Allen wrench (usually included)

• Punch or small tool for pin removal

• Gun mat or safe surface to work on

Step 1: Ensure Safety First
Before doing any work on your firearm, unload the rifle. Remove the magazine and visually inspect the chamber to confirm it’s empty. Always handle your rifle safely throughout the installation.

Step 2: Separate Upper and Lower Receivers
Push out the rear takedown pin to pivot the upper receiver forward. Then, push out the front pivot pin to separate the upper and lower receivers completely.

Step 3: Install the AR MAGLOCK System
Follow the included instructions for your AR MAGLOCK generation. Typically, you’ll remove the existing magazine release and install the fixed magazine locking system using the included hardware. This ensures your magazine is fixed unless the receivers are separated.

Step 4: Replace Rear Takedown Pin with KingPin
Remove the standard rear takedown pin and spring. Then, insert the KingPin, which includes an internal spring mechanism. The KingPin simplifies the pivot action, allowing quick separation of the upper receiver without tools—perfect for fixed magazine access during reloads.

Step 5: Reassemble and Function Check
Reattach the upper and lower receivers. Press the KingPin to test the pivoting motion and ensure it resets properly. Also, verify that the AR MAGLOCK functions correctly—when the rifle is closed, the magazine should not be removable.

Final Thoughts
Installing the AR MAGLOCK KingPin takes less than 30 minutes and dramatically improves the usability of your compliant AR-15. It’s a smart, legal-friendly upgrade that keeps you protected under current laws while simplifying disassembly and reloads. Whether you're heading to the range or just want peace of mind, this setup makes compliance easier and smoother than ever.