LMT Defense MRP-L M-LOK 9.25" "Grenadier" Upper Receiver L7SXG1A

The LMT Defense MRP-L M-LOK 9.25" "Grenadier" Upper Receiver (L7SXG1A) is LMT's newest 2026 MRP-L upper receiver, purpose-designed for under-barrel launcher integration and versatile accessory mounting. The "Grenadier" name comes from the full-length Picatinny rail at the 6 o'clock position, which accommodates any LMT rail-mounted launcher (including the M203) or any 1913 Picatinny accessory. The 3 and 9 o'clock positions feature short Picatinny sections for legacy accessories, while the remaining handguard features M-LOK attachment points for lightweight modern accessories. Integrated QD sling sockets on the aft end complete the package. Carbine-length, compatible with 10.5" to 16" LMT MRP-L barrels, and designed for both piston and direct impingement operation.

• Part Number: L7SXG1A (R-L7SXG1A)
• Platform: LMT MRP-L (AR-15 light platform)
• Handguard Length: 9.25" carbine-length
• Rail System: M-LOK primary + Picatinny at 3 o'clock, 6 o'clock (full-length), and 9 o'clock
• Bottom Rail: Full 1913 Picatinny rail at 6 o'clock for rail-mounted launchers
• QD Sockets: Integrated QD sling sockets on aft end of handguard
• Barrel Compatibility: LMT MRP-L barrels, 10.5" to 16"
• Operating Method: Compatible with both piston and direct impingement
• Construction: Single-piece forged aerospace-grade aluminum upper receiver & handguard
• Barrel Locking: Proprietary two-bolt system, T-30 Torx tool required
• Color: Black, Type III hard coat anodized
• Manufacturer: Lewis Machine & Tool (LMT Defense), Milan, Illinois, USA

New for 2026. Ideal for builds requiring an under-barrel mounted grenade launcher or rail-mounted accessories at 6 o'clock. Upper receiver only — barrel and BCG sold separately.