LMT Defense MRP-L Quad Rail 13.25" AR15 Complete Upper Receiver LMTQuadL16AS
LMT DefenseThe LMT Defense MRP-L Quad Rail 13.25" AR-15 Complete Upper Receiver (LMTQuadL16AS) is a factory-complete LMT upper receiver assembly — including the 13.25" quad rail monolithic upper receiver chassis, a 16" 5.56 NATO chrome-lined barrel, LMT enhanced full-auto bolt carrier group, and LMT ambidextrous charging handle. This is a complete, ready-to-shoot upper receiver group that drops directly onto any mil-spec AR-15 lower receiver. The quad rail system provides full Picatinny MIL-STD-1913 attachment points on all four sides for maximum accessory versatility. Milled from a single piece of aerospace-grade aluminum, the MRP upper is the only true monolithic rail platform available — providing the rigidity, accuracy, and modularity that has made LMT the choice of military and law enforcement worldwide.
- Part Number: LMTQuadL16AS
- Platform: LMT MRP-L AR-15 (drop-in for mil-spec AR-15 lower receivers)
- Caliber: 5.56x45mm NATO (.223 Remington)
- Barrel: 16" chrome-lined, 1:7 RH twist
- Gas System: Mid-length, direct impingement
- Upper/Rail: 13.25" Quad Rail monolithic one-piece aluminum chassis
- Rail System: MIL-STD-1913 Picatinny on all four sides
- BCG: LMT Enhanced Full-Auto Bolt Carrier Group included
- Charging Handle: LMT Ambidextrous charging handle included
- Muzzle Device: A2 birdcage flash hider
- Barrel Locking: Proprietary T-30 Torx two-bolt system (quick-change barrel capable)
- Finish: Type III mil-spec hard coat anodized
- Manufacturer: Lewis Machine & Tool (LMT Defense), Milan, Illinois, USA
Complete upper receiver group — lower receiver sold separately. Factory-built and test-fired by LMT for function and accuracy.