FN M249S Binary Trigger

Description

Introduction to the M249S Binary Trigger

The M249S is a civilian version of the famous M249 light machine gun. It’s a semi-automatic firearm with great potential for rapid shooting. One way to improve its performance is by upgrading to a binary trigger.

A binary trigger is special because it fires once when you pull the trigger and again when you release it. This makes shooting much faster while still being a semi-automatic system. Many gun owners like binary triggers because they offer quick firing and smooth shooting. However, before getting one, you should learn about the laws, safety, and purpose of using a binary trigger.

In this guide, we’ll explain how binary triggers work, their benefits, legal rules, and safety tips so you can make a smart choice.

Understanding Binary Triggers

What Is a Binary Trigger?

A binary trigger is a special trigger system that fires two shots per cycle—one when you pull and one when you release. This makes it faster than a regular semi-automatic trigger but does not turn your gun into a fully automatic weapon.

How Do Binary Triggers Work?

Binary triggers have two settings:

• Semi-Automatic Mode – Fires one shot per pull, just like a normal semi-auto trigger.
• Binary Mode – Fires one shot when you pull and one shot when you release.

This system uses advanced internal parts like a sear and hammer to make the gun shoot faster.

Are Binary Triggers Legal?

Binary triggers are legal under U.S. federal law because they are not classified as machine guns. However, some states have banned them, so you must check your local laws before buying one.

The M249S Trigger System

Standard M249S Trigger

The M249S comes with a standard trigger that works well, but upgrading to a binary trigger can make shooting faster and smoother.

Why Upgrade?

• Faster Shooting – Almost twice the fire rate of a regular semi-auto trigger.
• Better Experience – Makes target practice and competitions more fun.
• More Control – Helps you stay on target during fast shooting.

Features of the M249S Binary Trigger

Key Parts of a Binary Trigger

• Advanced Sear System – Controls how the hammer resets.
• Stronger Springs – Designed to handle fast shooting.
• Disconnector Mechanism – Ensures smooth operation and safety.

Binary vs. Forced Reset Triggers

A forced reset trigger makes the trigger reset faster, but it only fires on the pull, not the release. Binary triggers fire twice per cycle, while forced reset triggers fire once per cycle but reset quickly.

How to Upgrade Your M249S Trigger

Choosing the Right Trigger

• Good Brands – Look for trusted names like Franklin Armory or Fostech.
• Easy to Install – Some triggers require professional help for installation.
• Fits Your Gun – Make sure the trigger is compatible with your M249S model.

Safety & Training

Safe Shooting Practices

• Always Point in a Safe Direction – Keep your muzzle away from people.
• Keep Your Finger Off the Trigger – Until you’re ready to shoot.
• Learn the Modes – Practice switching between semi-auto and binary mode to avoid mistakes.

Troubleshooting & FAQs

• Gun Not Firing Properly? – Could be due to light primer strikes or incorrect installation.
• Legal Worries? – Always check local laws before using a binary trigger.