How to Install AR Trigger Pins | Anti-Walk Pin Guide

**CMC AR-15/10 Anti-Walk Pin Set – Small Diameter (.154")** $15.00

**KNS Precision Gen 2 Mod 2 Non-Rotating AR-15 Trigger/Hammer Pin Set – .154 Flat Dark Earth** $35.00

**KNS Precision Gen 2 Mod 2 Non-Rotating AR-15 Trigger/Hammer Pin Set – .154 Black** $29.00

How to Install AR Trigger Pins | Anti-Walk Pin Installation Guide

Swapping out your AR trigger pins for anti-walk pins is one of those simple upgrades that punches way above its weight. Whether you're running a high-end drop-in trigger or just want rock-solid reliability, anti-walk pins prevent your trigger and hammer pins from backing out under recoil. No wiggle. No wander. Just consistent performance.

If you’ve got a set of anti-walk trigger pins ready to go, here’s how to install them in under 10 minutes—even if you’ve never cracked open your lower receiver before.

What You’ll Need

AR-15 stripped lower (or complete lower)
Anti-walk trigger/hammer pin kit (like the KNS Precision Gen 2 Mod 2)
1/8" punch or similar tool
Small hammer (optional)
Hex key or Torx driver (usually included with the kit)
Drop-in trigger (optional but recommended)

Step-by-Step: Installing Anti-Walk Trigger Pins

1. Unload and Safe the Rifle

Yeah, yeah—we all say it. But seriously. Pull the mag, rack the bolt, check the chamber. Make sure your rifle is completely unloaded before you start messing with the internals.

2. Pop the Takedown Pins and Remove the Upper

Separate your upper from the lower. Set the upper aside—we won’t be needing it.

3. Remove Your Existing Trigger Pins

If you’re working with a mil-spec trigger, push out the old pins using a punch. If you’ve got a drop-in trigger with set screws, back those screws out first (check your trigger’s manual for exact directions).

Once removed, the trigger and hammer will come out together if it’s a drop-in unit. If not, remove the hammer and then the trigger group separately.

4. Drop in Your Trigger (If Upgrading)

If you're installing a new trigger like a Timney or Rise Armament, now’s the time. Set the trigger in place and make sure it's seated flush in the lower.

5. Install the Anti-Walk Pins

Slide the new anti-walk pins through the lower receiver and trigger assembly, one at a time. They’ll go in just like the originals, but the anti-walk design means they’re grooved or notched to lock into place.

Important: Most anti-walk kits come with side plates and screws. Align the side plates with the holes in the pins. Then screw them in snug—but don’t overtighten. Use the hex wrench or Torx key provided.

6. Double Check Fitment and Function

Once everything’s installed:

Make sure the trigger moves freely.
Cock and dry-fire the trigger a few times (with the upper off).
Check that the pins don’t shift or walk out when the hammer drops.

7. Reassemble and Done

Snap the upper back onto the lower, reinsert your takedown pins, and you’re good to go.

Quick Tips

Blue Loctite is a good idea on the side plate screws, especially if you're running a high-recoil setup.
Don’t mix brands. Use the pins that are made to match your trigger (some drop-ins require proprietary pins).
Anti-rotation ≠ anti-walk. Some kits prevent both; some only stop walking. Double-check what you’re buying.

Why Use Anti-Walk Pins in the First Place?

Regular mil-spec pins can “walk” over time—especially with lightweight triggers or hard-use rifles. If one walks out mid-string? Game over.

Anti-walk pins lock everything in place with side plates and screws. The result: a more secure trigger group and peace of mind whether you're running a range gun or duty rifle.

Looking for the best anti-walk setup? Shop KNS Non-Rotating Trigger Pins – Gen 2 Mod 2 – they’re easy to install and built for hard use.
Need a different size or style? Browse all AR Trigger Pins and Anti-Walk Kits to find the right fit for your build.
Drop-in units like Timney Alpha Triggers often benefit from anti-walk pins to stay perfectly aligned during high round counts.
Doing a full build? Don’t stop at pins—explore AR-15 lower parts & upgrade kits to round out your lower with high-quality components.
Want to level up your entire setup? Shop all AR-15 accessories and take your build from basic to badass.

✅ FAQ Section

Q: What tools do I need to install anti-walk trigger pins?
A: You’ll need a small punch, hex or Torx driver (usually included with the pin kit), and optionally a small hammer. A bench block can also help but isn’t required.

Q: Are anti-walk pins better than standard trigger pins?
A: Yes—especially with drop-in triggers or rifles under heavy use. They prevent pins from walking out over time and add extra security.

Q: Can I use anti-walk pins with any AR-15 trigger?
A: Most anti-walk pins are universal, but some drop-in triggers require proprietary pin sizes. Always check compatibility with your trigger manufacturer.

Q: Do I need to use Loctite on anti-walk pin screws?
A: Using blue (non-permanent) Loctite on the screws is a good idea. It keeps the side plates from loosening during extended shooting sessions.

Q: Will installing anti-walk pins affect my AR's function or trigger pull?
A: Not at all. If installed properly, they won’t change how your trigger feels or functions—they just keep everything locked in place.