The Kak Industry 121-0212-010 is a mid-length gas 5.56 rifle barrel built for AR platform builds that demand quality American manufacturing without the premium price tag. At 16 inches, this barrel strikes a practical balance for shooters who want a compact, maneuverable rifle suitable for home defense, tactical training, or shorter-range hunting without sacrificing reliability or accuracy potential. Kak Industry, founded in 2011, has built a reputation for delivering solid domestic components that work—no hype, no corner-cutting.

The mid-length gas system on this barrel is a field-proven design that runs cleaner and with slightly softer recoil impulse compared to carbine-length systems, which many shooters prefer when building a versatile AR. The phosphate finish provides a durable, corrosion-resistant surface that handles field use and storage without fussing. Black finish rounds out a no-nonsense build platform that fits a wide range of upper receiver assemblies and shooting applications.

Whether you're completing a rifle build, swapping uppers, or setting up a truck gun, this barrel gives you a genuine domestic option at a price point that respects your budget. It's the kind of component that lets you spend money on optics and ammunition instead of marketing hype.

Key Features

• 16-inch barrel length for compact, maneuverable handling
• Mid-length gas system for reduced recoil impulse and improved dwell time
• Phosphate finish for corrosion resistance and durability
• American-made quality at sustainable pricing
• 5.56 NATO chamber for standard rifle ammunition compatibility

Specifications

Brand	Kak Industry
Caliber	5.56 NATO
Barrel Length	16 inches
Gas System	Mid-Length
Finish	Phosphate, Black
Model/Part Number	121-0212-010

Frequently Asked Questions

Will this barrel fit my AR-15 upper receiver?

This is a 5.56 NATO barrel designed for standard AR-platform uppers. Verify that your upper receiver is chambered in 5.56 NATO or .223 Remington and that the barrel extension matches your upper's bolt carrier.

What's the advantage of a mid-length gas barrel?

Mid-length gas systems are known for smoother operation and slightly softer recoil compared to carbine-length systems. They also tend to run cooler, which many shooters appreciate during extended range sessions or training.

Is this barrel suitable for hunting?

Yes. A 16-inch 5.56 barrel works well for hunting applications where effective range and accuracy requirements align with the cartridge's ballistics—such as medium-sized game at typical hunting distances, subject to local regulations and your own marksmanship and equipment.

What finish is this barrel, and how durable is it?

The barrel features a phosphate finish in black. Phosphate is a time-tested military-grade finish that provides solid corrosion resistance and durability for both storage and field use.