LMT MRP 5.56 NATO Chrome Lined AR-15 Barrel – 16″ 1:7 Twist
The LMT MRP-L 16″ 5.56 NATO Barrel is a factory replacement barrel assembly designed specifically for LMT monolithic MRP-L upper receivers. Built from Chromoly steel with a chrome-lined bore, it combines durability, corrosion resistance, and proven 5.56 performance in LMT’s proprietary quick-change barrel system.
The barrel features a 1:7 right-hand twist and a mid-length direct-impingement gas system. LMT installs the low-profile gas block, straight gas tube, and A2 birdcage flash hider at the factory, providing a complete barrel assembly ready for installation into a compatible MRP-L upper.
LMT cryogenically treats its barrels for long-term durability and stress relief, and each barrel is test-fired for accuracy before shipment.
Features
- Factory LMT MRP-L barrel assembly
- 16″ chrome-lined 5.56 NATO configuration
- 1:7 right-hand twist
- Mid-length direct-impingement gas system
- Cryogenically treated for durability
- Factory-installed low-profile gas block
- Factory-installed straight gas tube
- A2 birdcage flash hider included
- Accuracy-tested by LMT
Specifications
- Platform: LMT MRP-L
- Caliber: 5.56×45 NATO / .223 Remington
- Barrel Length: 16″ / 406 mm
- Barrel Material: Chromoly
- Bore: Chrome-Lined
- Twist Rate: 1:7 RH
- Gas System: Mid-Length
- Operating Method: Direct Impingement
- Gas Block: Low Profile
- Gas Tube: Straight
- Muzzle Device: A2 Birdcage
- Manufacturer Part Number: R-L7PA1B
This barrel is made for the LMT CQB/MRP Monolithic receiver. It will not fit MWS receivers.





