LMT MRP Direct Impingement Barrels

LMT MRP Chrome-Lined Barrels – 5.56 NATO & .300 Blackout
LMT Defense’s MRP chrome-lined barrels are built for hard use, modularity, and uncompromising performance. Designed to work with LMT’s patented Monolithic Rail Platform (MRP) upper receivers, these barrels offer quick-change capability with rock-solid repeatability and legendary durability trusted by military and professional users worldwide.

Whether you're building a CQB setup, a general-purpose carbine, or a full-length precision rifle, LMT’s cold hammer-forged, chrome-lined barrels deliver performance and longevity in a true duty-grade platform.

Available Models:

• 5.56 NATO – 11.5" (CQB-length, ideal for SBRs and PDW builds)

• 5.56 NATO – 16" (standard carbine/recce configuration)

• 5.56 NATO – 20" (optimized for long-range accuracy and velocity retention)

• .300 Blackout – 10.5" (suppressed short-barrel setup with subsonic or supersonic capability)

Key Features:

• Designed for LMT MRP quick-change upper receivers

• Cold hammer-forged, chrome-lined for extreme durability

• 1:7 twist for modern projectile stabilization

• M4 feed ramps, factory gas block, and pinned gas port (ready to drop in)

• Threaded muzzle (1/2x28 for 5.56, 5/8x24 for .300 BLK)

• Built to military-grade specifications by Lewis Machine & Tool

• Made in the USA

Note: These barrels are not compatible with standard AR-15 upper receivers — they are purpose-built for LMT MRP platforms.