Lantac 11.5" 300 Blackout Bbl -

The Lantac 11.5" 300 Blackout barrel is a short-barreled rifle (SBR) solution built for shooters who want serious accuracy without the length. This 300 Blackout barrel pairs a compact 11.5-inch profile with a pistol-length gas system, making it an excellent choice for short-range precision, suppressed shooting, and tactical builds where maneuverability matters. Lantac's reputation for meticulous barrel manufacturing—each one individually matched to its extension and head-spaced against a master bolt—translates to the kind of consistency that separates reliable uppers from shooters' uppers.

Built from certified 416R stainless steel, this barrel is precision gun-drilled, double-reamed, and honed before rifling. The progressive button rifling system cuts six grooves in a 1:7 twist, a rate optimized for 300 Blackout's range of bullet weights—from subsonic 220-grain loads to supersonic 110-grain rounds. That twist rate and Lantac's attention to chamber and extension fitment mean you're starting with a barrel that's engineered to shoot, not just assemble.

The extended M4 feed ramps ensure smooth feeding regardless of your upper receiver, and the pistol-length gas system keeps the action responsive without over-gassing. Made in the USA, this is a component for builders who understand that a quality barrel is the foundation of a quality rifle. Whether you're assembling a short-range hunting rig, a suppressed workhorse, or a precision 300 Blackout build, Lantac's engineering gives you a head start.

Key Features

• 11.5-inch barrel length optimized for SBR builds and compact platforms
• Certified 416R stainless steel construction for durability and corrosion resistance
• Pistol-length gas system for reliable cycling and manageable recoil
• 1:7 twist rate suited to 300 Blackout subsonic and supersonic loads
• Extended M4 feed ramps for reliable feeding across upper receivers
• Progressive button rifling with 6-groove profile
• Individually matched barrel extension and head-spaced to master bolt for precision fitment
• Made in the USA

Specifications

Frequently Asked Questions

What is the 1:7 twist rate best for?

The 1:7 twist is ideal for 300 Blackout across its full spectrum—it stabilizes subsonic loads (typically 208–220 grain) and supersonic rounds (110–147 grain) effectively. This versatility makes it a sensible choice if you plan to shoot a mix of ammunition or run a suppressor with subsonic rounds.

Will this barrel work with my upper receiver?

Yes. The extended M4 feed ramps are compatible with most AR-pattern uppers. The barrel extension is individually matched during manufacturing, ensuring proper headspace. Confirm your upper receiver is 300 Blackout-compatible and in good condition before assembly.

Is this a complete upper or just a barrel?

This is a barrel only. You will need a compatible upper receiver, bolt carrier group, gas tube, and other components to complete a functioning upper assembly.

What does pistol-length gas mean?

Pistol-length gas tuning is shorter than midlength or rifle-length systems, resulting in a quicker return to battery. This typically produces a snappier recoil impulse and is common in short-barreled rifles like this 11.5-inch platform.