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IA Iron River Armory

LWRC ICMKII 5.56 NATO 12.7″ SBA3 Pistol

SKUTSW|184165 Conditionnew CategoryAR Pistols
$2689.27
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Specs at a glance

LWRC ICMKII 5.56 NATO 12.7″… SPECS AT A GLANCE 12.70 inches SIZE
Editorial diagram — measurements verified during testing.

About this product

The LWRC ICMKII is a compact AR-style pistol built around LWRC’s proprietary short-stroke gas piston system and a 12.70-inch spiral-fluted barrel. It includes an M-LOK handguard and an internal, two-position paddle-style adjustable gas block for suppressed or unsuppressed operation. The pistol configuration ships fitted with an SBA3 stabilizing brace and flip-up front and rear sights. This design emphasizes reliable function, modular accessory mounting and compact handling for close-quarters utility.

Key Specifications

  • Chambered in .223 Rem / 5.56 NATO for standard NATO-compatible performance.
  • The barrel measures 12.70 inches and is spiral-fluted for a distinctive profile.
  • Operates using a proprietary short-stroke gas piston system for reliable cycling and reduced fouling.
  • Equipped with a M-LOK handguard for modular accessory attachment.
  • Features a two-position paddle-style adjustable gas block located inside the rail to select suppressed or unsuppressed operation.
  • Fitted with an SBA3 stabilizing brace in place of a traditional stock.
  • Supplied with a 30-round magazine for extended capacity where lawful.
  • Includes flip-up front and rear sights for sighting redundancy and co-witness options.
  • Stock is constructed from black polymer for lightweight durability.
  • Grip is made of black polymer for a consistent ergonomic interface.

Designed for the informed shooter who values compact handling and proven piston-driven reliability, the ICMKII balances a short overall profile with full-featured modularity. Its M-LOK handguard, adjustable gas system, and SBA3 brace make it well suited to close-quarters utility and role-specific builds while maintaining straightforward maintenance and consistent function.

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Sources & methodology. Editorial review and rating by Travis Caldwell based on hands-on testing notes and published vendor specifications. Pricing verified at time of publication.
$2689.27