Cmc Triggers Bbl556003 Ar Barrel 5.56 Nato 16" Black

A quality replacement or spare barrel for your AR platform rifle, the CMC Triggers 5.56 NATO 16" barrel in black gives you options when you need them. Whether you're building a new upper, swapping calibers, or keeping a backup ready, a dedicated barrel is a straightforward way to expand what your AR can do without buying an entirely new rifle. At 16 inches, this barrel offers a practical balance of velocity and handling—compact enough for tactical or home-defense setups, yet long enough to wring good performance from 5.56 NATO ammunition.

CMC Triggers is known for precision components, and this barrel follows that standard. A properly fitted barrel is the foundation of accuracy and reliability in any AR build, so sourcing one from a reputable maker matters. This one comes finished in black, which means it'll integrate cleanly with most modern furniture and coatings.

Swapping an AR barrel is straightforward work if you have basic gunsmithing knowledge or a armorer's wrench and upper vice block—no permanent modifications to your rifle needed. This makes a spare barrel one of the smartest investments for shooters who want flexibility without the expense of a second complete upper receiver.

Key Features

• 5.56 NATO chambering—widely available ammunition and proven performance
• 16" barrel length—compact yet capable for a range of shooting disciplines
• Black finish—durable and blends with standard AR furniture
• CMC Triggers brand quality—precision manufacturing and attention to detail

Specifications

Frequently Asked Questions

Will this barrel work with my AR-15 upper receiver?

This is a 5.56 NATO barrel sized for standard AR-pattern uppers. Fit depends on your specific upper receiver—compatibility is determined by the barrel extension profile and bore diameter. If you're unsure, consult your upper's documentation or contact us.

Is this barrel suitable for hunting?

At 16 inches, this 5.56 NATO barrel can certainly be used for hunting, though performance and effective range will vary depending on your game and local regulations. Many hunters prefer this caliber and barrel length for varmint work and lighter game.

What tools do I need to install this barrel?

You'll need an armorer's wrench sized for your barrel nut and an upper receiver vice block to safely hold the upper during installation. This is work many shooters handle themselves, or you can have a qualified gunsmith install it.

Can I use this for an AR pistol build?

A 16" barrel exceeds the legal length for AR pistols in most jurisdictions. Check your local and federal laws before building any firearm configuration.