What wrench/settings are used to change an MRP/MWS barrel?

MRP/MWS locking screws use a T-30 head and should be torqued to 140 in/lbs for optimum performance.  The LMT Torque Wrench is designed to this exact specification.  Need a tutorial?  Check out our video on YouTube!

Are LMT Defense barrels CHF (Cold Hammer Forged)?

No, LMT barrels are not cold hammer forged. Commonly confused with CHF, is our cryogenic stress relieving process. This is done on all barrels, both chrome-moly and stainless.

762X51 Nato or 308 Win in my MWS?

Good news! You can shoot both NATO 762 and commercial grade 308 Win through your MWS rifle. The commercial spec ammo actually runs slightly higher pressures over the 7.62X51. However we build our barrels to withstand greater pressure than either calibers produce. However we do NOT recommend use of hand loaded ammo in either caliber.

What barrels are compatible?

MRP (5.56/.223) and MWS (7.62/.308) platforms are independent of one another. LMT barrels made for the monolithic platforms are proprietary.  While all MWS barrels are compatible with that platform, the MRP hosts two upper receiver lengths, each with their own capabilities.

What is the life expectancy of LMT Defense barrels?

There is no set barrel life or round count for our barrels. Heat is the enemy of steel. Depending on how hot you get your barrel, and for how long that temperature is sustained, can have great affect the life of a barrel. Barrel material like stainless steel and chromoly with a chrome lining are affected differently. The last factor that can affect barrel life is maintenance or care and bullet type. Maintaining your equipment is crucial to longevity, the bore of a rifle is no exception. Different types of bullets and jackets interact differently with the rifling, make sure to use proper maintenance for your particular ammo.

What parts can I use to build my MWS?

The LMT MWS is one of the leaders in the commercial AR-10 market. One big feature that sets our weapons apart is the ability to quickly change barrel types and calibers while maintaining less than 1 MOA shift. Typically, AR type weapons are plug and play thanks to the US DOD and industry standard of specifications. The “AR-10” family of rifle does not follow a specific industry standard. While our MWS is a true SR-25 pattern and will work with Knights Armament equipment, we highly suggest only using LMT certified parts to avoid any issues derived from a stack up of tolerances.

What are the advantages of the Enhanced Bolt Carrier Group?

The LMT Enhanced BCG has many features to cure or improve common issues on the AR-15 type weapon system. See below the list of features and advantages to using the Enhanced Bolt Carrier Group.

  • Enhanced “Lobster Tail” extractor: This unique extra extractor utilizes two specific springs vs one standard spring to provide a very positive capture on the rim of the case.
  • Enhanced bolt lugs: Our specifically cut bolt reduces impact shock and wear on the lugs themselves while improving their strength. You’ll notice one lug, opposite of the extractor, is cut intentionally as to not present a bias on one side due to placement of the extractor.
  • Proprietary coating: Our bolt features a coating that reduces wear, increases lubricity, and helps decrease maintenance time.
  • Elongated cam path: The elongated cam path allows the bolt to remain locked in battery for a slightly longer duration of time maximizing the efficiency of the gas system and presenting less blow back to the shooter.
  • More gas ejection ports: The enhanced carrier features additional gas ejection ports to quickly disperse any excess gas not necessary to the cycle of the weapon system. This feature also reduces gas blow back to the shooter.

Reduced surface carrier rails: These rails reduce friction on the upper receiver, improve lubricity by allowing oil to travel in between the contact patches and allow a gap for debris to move away from building up on the carrier body.

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