Ballistic Advantage BABL556010M Modern Series Mid-Length/Government 5.56x45mm NATO 14.50″ Threaded Fits AR-15

Mid-length AR barrels strike a practical balance between velocity and handling, making them popular for shooters building versatile platforms. Whether you're assembling your first rifle or upgrading an existing build, understanding barrel specifications matters before you commit. TacticCAL in Mountain View helps builders navigate their projects while staying current on California firearm laws that affect your choices.

Mid-Length Gas System and Twist Rate

The 1:7" twist rate on this Modern Series barrel stabilizes a wide range of projectile weights, from lighter 55-grain rounds to heavier match ammunition. Mid-length gas systems reduce carrier tilt compared to carbine-length designs, which can extend component life during extended shooting sessions. The 14.5" tube delivers velocity gains over shorter barrels while maintaining maneuverability in tight spaces. Before finalizing your build, review PC §32100 exempt revolvers and other state regulations that may affect your final configuration. Visit our gun store in Sunnyvale for our full catalog.

Frequently asked questions

What's the difference between mid-length and carbine-length gas tubes?

Mid-length systems position the gas port farther back on the barrel, reducing bolt carrier velocity and recoil impulse. Carbine-length systems cycle faster but hit harder. Mid-length is gentler on parts and smoother to shoot.

Can I use this barrel with a standard AR-15 upper receiver?

Yes. This barrel has standard 0.750" diameter at the journal and fits any mil-spec AR-15 upper receiver. Ensure your gas tube length matches the mid-length system when assembling.

What is an FFL transfer in California?

An FFL transfer is when a federally-licensed dealer like TacticCAL receives a firearm shipped from another seller and processes California's required DROS paperwork to legally transfer it to you. TacticCAL is your gun store Cupertino in the Bay Area.