LMT MRP Gen 2 5.56 NATO Chrome Lined Piston AR-15 Barrel - 12"

Manufactured by Lewis Machine & Tool
Manufactured by Lewis Machine & Tool
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The MRP Gen 2 5.56mm Chrome Lined Piston Barrel by Lewis Machine and Tool Company is a versatile and durable barrel. It boasts a piston operating rod and is adjustable for regular or suppressed operation providing a great deal of utility for one barrel. The LMT MRP barrel offers an A2 birdcage flash hider to help mitigate muzzle flash. The barrel is coated and cryogenically treated for long term durability. It features a 41V50 chrome moly vanadium steel chrome construction and is chrome lined for a high-degree of reliability and accuracy. 

Additionally, the cryogenic treatment further enhances the strength and service life of this barrel. In short, the LMT MRP Gen 2 Chrome Lined Piston Barrel offers the durability-enhancing features that one would expect from a high-grade carbine. LMT’s unrivaled reputation for accuracy and durability are on display with this barrel, a barrel that can withstand heavy use and abuse of any environment. The LMT 5.56mm piston barrel is a quality upgrade to any rifle and a great component for any AR build by providing unmatched durability, reliability and accuracy.


  • Manufactured by Lewis Machine and Tool
  • 5.56mm
  • 12-inch barrel
  • 41V50 chrome moly vanadium steel barrel, chrome lined 
  • 1:7” RH twist barrel
  • For LMT monolithic receiver 
  • Cryogenically treated for maximum durability
  • A2 birdcage flash hider
  • Adjustable gas piston block for regular or suppressed operation
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Barrel CoatingManganese Phosphate
Barrel Length12
Barrel LiningChrome
Barrel Material41V50 Chrome Moly Vanadium Steel
BrandLewis Machine & Tool
Caliber Gauge5.56 NATO
Feed RampsM4
Gas System LengthCarbine
Thread Pattern1/2 X 28
Twist Rate1:7
California Prop 65 warning

 WARNING: This product can expose you to chemicals, which are known to the State of California to cause Cancer and Reproductive Harm. For more information go to www.P65Warnings.ca.gov.

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