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LMT Defense - MRP-H Quad Rail 12.75" AR10/AR308 Upper Receiver - LM308B1
LMT Defense
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LMT Defense
LMT Defense - MRP-H Quad Rail 12.75" AR10/AR308 Upper Receiver - LM308B1
The LMT Defense MRP-H® Quad Rail (Picatinny) 12.5" AR10/AR308 Upper Receiver (LM308B1) is built around the patented LMT Monolithic Rail Platform (MRP™) engineered for large-caliber platforms. Receiver and handguard machined from a single piece of forged aerospace-grade aluminum for maximum rigidity and zero flex. Includes a 19.25" top Picatinny rail and 9" rails on the 3, 6, and 9 o'clock positions — providing full four-sided Picatinny rail coverage for maximum accessory compatibility. Weight: 2.116 lbs.
The proprietary two-bolt barrel locking system uses a standard T-30 Torx bit — enabling fast, tool-minimal barrel swaps without a full armorer kit. Compatible calibers include 7.62×51 NATO (.308 Win), 6.5 Creedmoor, .243 Winchester, .260 Remington, 7mm-08 Remington, and .338 Federal. Supports Direct Impingement and Mid-Length Short Stroke Piston operation. Barrel not included.
Specifications
- Platform: MRP-H® (Heavy) — Large Caliber
- Rail System: Quad Rail (Picatinny)
- Caliber compatible: 7.62×51 (.308 Win), 6.5 Creedmoor, .243 Win, .260 Rem, 7mm-08, .338 Federal
- Operating Method: Direct Impingement and Piston compatible
- Single-piece forged aerospace aluminum construction
- Fast barrel swap — T-30 Torx bit only
- Requires LMT MRP monolithic barrel assemblies
- Made in the USA by Lewis Machine & Tool
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