Ftlt Mcr 12.5 Adj Bbl W/Front Sight Qc

The Fightlite MCR 12.5 adjustable barrel with front sight and quick-change system is a complete, ready-to-run barrel assembly built for MCR-platform rifles and compatible upper receivers. If you're building or upgrading a 5.56 NATO rifle for close-quarters work, home defense, or short-range shooting, this heavy-profile barrel assembly delivers the components you need in one package—no separate sourcing required.

What makes this barrel stand out is the integrated system: you get the heavy-profile barrel matched with a mid-length gas system and a 4-position adjustable regulator piston, letting you tune the cycling to your specific ammunition and suppressor setup (if applicable). The quick-change barrel handle assembly means you can swap this barrel out without breaking down the entire rifle, which is handy for maintenance, testing loads, or swapping between configurations. Everything is phosphate-finished for corrosion resistance and durability in field conditions.

Fightlite built this as a complete assembly—barrel extension with gas block, piston, 4-position regulator, flash hider, and front sight are all included and ready to go. The front sight is pinned and comes with the carry handle assembly, so you have backup iron sights out of the box. Threading is standard 1/2-28 TPI, and the 1:7 right-hand twist handles 5.56 NATO ammunition and the full range of bullet weights that caliber supports. Made in the USA throughout.

This is the kind of barrel assembly that suits builders who want a drop-in solution for MCR or Shrike 5.56 platforms—no hunting for matching components or worrying about headspace. The heavy profile and mid-length system are built for sustained fire, so if you're planning accuracy work or extended shooting sessions, the heat capacity is there.

Key Features

• Complete barrel assembly—gas block, piston, regulator, flash hider, front sight, and carry handle all included
• Heavy profile barrel for sustained fire and heat management
• 4-position adjustable regulator piston for tuning to your ammunition and suppressor
• Quick-change barrel handle system for easy swap-out without full disassembly
• Mid-length gas system balances reliability and recoil impulse
• Phosphate finish resists corrosion and wear
• Backup iron sights (front sight and carry handle) included and pinned
• Standard 1/2-28 TPI threading for common muzzle devices
• Made in USA
• Compatible with MCR and Shrike 5.56 rifles and upper receiver assemblies

Specifications

Frequently Asked Questions

What's included with this barrel assembly?

This is a complete package: the barrel itself with extension, gas block assembly, piston, 4-position adjustable regulator, flash hider, front sight assembly, and quick-change barrel handle assembly. You're getting backup iron sights (front sight and carry handle) pinned and ready. Essentially, everything needed to install it onto a compatible MCR or upper receiver.

Is this barrel compatible with my AR platform?

This barrel assembly is designed for Fightlite MCR and Shrike 5.56 rifles and compatible upper receiver assemblies. If you have a standard AR-15 upper, verify compatibility with the MCR or Shrike platform before purchase, as this is a proprietary fit for those systems.

Can I adjust the gas system on this barrel?

Yes. The barrel includes a 4-position adjustable regulator piston, which lets you tune the gas flow to match your specific ammunition and setup, including suppressed or unsuppressed use. This tuning capability helps optimize reliability and recoil impulse for your load and conditions.

What's the advantage of the quick-change barrel handle?

The quick-change barrel handle assembly (part number 15035) allows you to swap the barrel without disassembling the entire rifle. This is useful for maintenance, testing different loads or configurations, or rotating barrels between builds without breaking down the upper receiver.