LMT MWS Barrel

Upgrade your MWS or MARS-H rifle with genuine LMT Defense MWS barrels — precision-engineered for modularity, durability, and mission-ready performance. Built with LMT’s proprietary Monolithic Weapon System (MWS) interface, these barrels allow fast, toolless caliber swaps with repeatable zero retention.

Available in a range of calibers including 7.62 NATO / .308 Win, 6.5 Creedmoor, .260 Rem, and .243 Win, and in lengths from 13.5" CQB profiles to 20" precision rifle setups, LMT MWS barrels are the standard for military, law enforcement, and high-performance civilian shooters. Each barrel is chambered, crowned, and headspaced by LMT for optimal fit and function.

Features:

• Compatible with LMT MWS / MARS-H monolithic upper receivers

• Available calibers: 7.62 NATO / .308 Win, 6.5 Creedmoor, .260 Remington, .243 Winchester

• Available lengths: 13.5", 16", 18", 20"

• Quick-change barrel design with hardened steel barrel extension

• Chrome-lined or stainless steel options depending on configuration

• Threaded muzzle (5/8x24) for suppressor or muzzle device use

• Includes factory-installed gas block and gas tube (varies by model)

• Made in the USA by Lewis Machine & Tool

Note: Each barrel is individually serialized and headspaced by LMT. If you're unsure which profile or caliber fits your setup, feel free to reach out for compatibility assistance.