Sig MCX Spear LT vs LMT MRP | 11.5 Piston Uppers
This video provides a detailed comparison between the Sig MCX Spear LT and the LMT MRP 11.5-inch piston uppers. It highlights differences in weight, ergonomics, rail systems (monolithic vs. modular), and internal mechanics. While the LMT offers heirloom quality and parts compatibility, the Sig Spear LT is praised for its modern design and lighter weight, though conversion costs can equalize pricing.









