European Contract Overrun | Exclusive 11.7" Configuration
This is not your standard production LMT upper. Originally manufactured to fulfill a European contract, this LMT Defense MRP-L Complete Upper Receiver features a unique 11.7" 5.56mm Gen 2 piston barrel produced specifically to meet the contract's requirements. The 11.7" barrel length is not part of LMT's regular commercial production lineup, making this a rare opportunity to own a contract-specific MRP configuration.
Available only through Brownells in extremely limited quantities, these complete uppers come from a finite contract overrun rather than an ongoing production run. For LMT enthusiasts looking for something outside the standard catalog, this is a unique configuration with a genuine contract-production history. Once they're gone, they're gone.
LMT Monolithic Rail Platform (MRP)
The patented LMT Monolithic Rail Platform combines the upper receiver and handguard into a single component, CNC-machined from one piece of forged aerospace-grade aluminum. Unlike conventional AR-15 uppers with a separately attached handguard, the one-piece MRP design provides a rigid, continuous mounting platform for optics, aiming devices, and accessories.
The monolithic construction eliminates the traditional handguard-to-receiver connection, helping minimize movement between mounted accessories and the upper receiver. The continuous top rail also provides additional flexibility for optics mounting.
Modular Barrel System
One of the defining features of the LMT MRP is its proprietary quick-change barrel system. MRP barrels are secured through a two-bolt locking interface on the right side of the receiver, allowing the platform to accommodate compatible barrel configurations without replacing the entire upper receiver.
The MRP platform supports both direct impingement and piston-operated configurations when equipped with the appropriate compatible components. This complete upper is supplied in its contract-specific 11.7" Gen 2 piston configuration.
11.7" Gen 2 Piston Barrel
The centerpiece of this contract overrun is its 11.7" 5.56mm chrome-lined barrel with a 1:7" twist rate. Manufactured to a specific European contract requirement, this unusual barrel length distinguishes the upper from LMT's standard commercial offerings.
The Gen 2 piston operating system includes a two-position gas plug and corresponding Gen 2 piston bolt-carrier group. The upper is completed with an LMT-AT closed-tine flash hider featuring Xeno-compatible mounting geometry.
Features & Specifications
- Production: Limited European contract overrun
- Availability: Limited quantities, exclusive to Brownells
- Upper Receiver: LMT MRP-L Quad 9.25" Monolithic Rail Platform
- Receiver Construction: CNC-machined from a single forged aerospace-grade aluminum component
- Barrel Length: 11.7", contract-specific configuration
- Caliber: 5.56 NATO
- Barrel Finish: Chrome-lined bore
- Twist Rate: 1:7"
- Operating System: Gen 2 Gas Piston
- Gas System: Two-position gas plug
- Muzzle Device: LMT-AT Closed-Tine Flash Hider, Xeno-Compatible
- Bolt Carrier Group: Gen 2 Full-Auto Piston BCG
- Charging Handle: Ambidextrous
- Barrel Interface: Proprietary LMT MRP two-bolt locking system
What's Included?
- LMT MRP-L Quad 9.25" Upper Receiver
- 11.7" 5.56mm Chrome-Lined Gen 2 Piston Barrel
- LMT-AT Closed-Tine Flash Hider
- Gen 2 Full-Auto Piston Bolt Carrier Group
- Ambidextrous Charging Handle
- Operator's Manual
- Three Rail Panels
Restricted Part
Please check with your state regulations for ownership of Restricted Parts. May require documentation.
