The LWRC ICMKII 14.7-inch SBR black is the longest short-barrel configuration of LWRCI’s MKII Individual Carbine in 5.56 NATO (LWRC part no. ICMKIIR5B14S). It runs LWRCI’s patented short-stroke gas piston instead of direct impingement, which keeps combustion gas and carbon out of the receiver. The MKII generation adds a one-piece Monoforge upper, an M-LOK handguard, and a two-position gas block that now sits inside the rail. A 14.7-inch barrel keeps nearly carbine-length velocity in a shorter package. It suits duty, home defense and range use for shooters who want a piston rifle with a little more barrel.

Key Specifications

• The chambering is 5.56 NATO, which keeps ammunition choices open.
• Barrel length is 14.7 inches, the longest of the ICMKII’s short-barrel options.
• The barrel is cold hammer forged with a 1:7 twist, a rate that handles a broad range of 5.56 bullet weights.
• The action is LWRCI’s patented short-stroke gas piston, chosen for reliability and easy maintenance.
• The upper is a one-piece Monoforge receiver, which LWRCI says is stronger than a standard-pattern upper.
• The finish is black anodized, the standard ICMKII color.
• Sights are LWRCI Skirmish back-up iron sights, a fallback sight picture if an optic fails.

Frequently Asked Questions

How is the ICMKII different from a direct-impingement carbine? It uses LWRCI’s short-stroke gas piston, which keeps combustion gas out of the receiver, and its two-position gas block selects suppressed or unsuppressed operation.

Do I need ATF approval to buy this? No. As of October 9, 2026, ATF no longer requires Form 4 approval, registration or a tax stamp for short-barreled rifles. It transfers on a Form 4473 with a background check through a Class 3 (SOT) dealer. State and local laws still apply. Taking an SBR across state lines still requires an approved ATF Form 5320.20.

Can left-handed shooters run it? Yes. The bolt catch and release, magazine release, safety selector and charging handle are all ambidextrous.

Buy the LWRC ICMKII SBR 5.56 NATO, 14.7-Inch Barrel, Black

As of October 9, 2026, this short-barreled rifle transfers on a Form 4473 with a background check at your Class 3 (SOT) dealer, with no Form 4 or tax stamp; state and local laws still apply. Order through LWRC‘s short-barreled rifles lineup and our Lubbock, Texas team will handle the transfer, and it ships fast to your Class 3 dealer.