The LWRC ICMKII SBR (brand part no. ICMKIIR5PBC14S) is a 5.56mm short-barreled rifle built around a 14-inch barrel and finished in Patriot Brown, built on LWRC’s proven ICMKII platform. A patented LWRCI short-stroke gas piston system keeps the action running clean and reliable, while a Black Nitride-treated, cold-hammer-forged heavy-profile barrel with a 1:7 twist stabilizes a wide range of 5.56 bullet weights. The Monoforge one-piece upper receiver is stronger than a standard two-piece pattern, and a nickel-boron-coated bolt carrier group adds wear resistance, corrosion resistance, and permanent lubricity. LWRCI Skirmish back-up iron sights, an A5 2-position gas block, and a fully ambidextrous lower round out a compact 5.56 platform built for serious duty and range use.

Key Specifications

• Chambered in 5.56mm NATO.
• Wears a 14-inch heavy-profile barrel for a compact SBR footprint.
• Barrel is cold hammer forged with a 1:7 twist rate.
• Finished in Patriot Brown.
• Built on a one-piece Monoforge upper receiver.
• Runs LWRCI’s patented short-stroke gas piston system.
• Bolt carrier is nickel-boron coated for wear and corrosion resistance.
• Includes LWRCI Skirmish back-up iron sights.
• Feeds from an included Magpul 5.56 PMAG 30.
• Fully ambidextrous lower receiver controls, including bolt catch, magazine release, and safety selector.

Frequently Asked Questions

Is this an NFA item? Yes. As a Short-Barreled Rifle (SBR), it’s a Title II firearm requiring an approved ATF Form 4 and transfer through an NFA-licensed dealer.

What magazine does it ship with? A Magpul 5.56 PMAG rated for 30 rounds.

What gas system does it use? LWRCI’s patented short-stroke gas piston system, built for reliability and easy maintenance.

Buy the LWRC ICMKII SBR, 5.56mm, 14-Inch Barrel

This is a Title II firearm regulated under the National Firearms Act. Purchase requires an approved ATF Form 4, no federal transfer tax, and transfer through a licensed NFA (SOT/Class 3) dealer, with an extended federal approval wait before delivery. Order through LWRC‘s Short Barrel Rifles (SBR) lineup and our Lubbock, Texas team will walk you through the transfer process.