The Sig Sauer MCX Spear LT in 7.62x39mm (MPN RMCX-762R-16B-LT) brings the long-awaited 7.62x39mm caliber to the MCX family, built around a lightened-profile 16-inch carbon steel barrel with a 1:9.5-inch twist on a gas piston operating system. Sig Sauer fits this rifle with a SIG Flatblade match trigger, fully ambidextrous controls, an interchangeable barrel system, and a SIG QD suppressor-ready flash hider threaded 5/8×24. The minimalist coyote-finished folding stock collapses for maximum compact storage, and the rifle ships optic-ready with a 28-round steel magazine included. Among AR-platform rifles in the AR rifles category, the MCX Spear LT favors shooters who want a modular, folding-stock 7.62x39mm platform.

Key Specifications

• Chambered in 7.62x39mm.
• Rifled at a 1:9.5-inch twist on a carbon steel barrel.
• Features a 16-inch lightened-profile barrel.
• Runs a gas piston operating system.
• Ships with a SIG Flatblade match trigger.
• Includes an interchangeable barrel system.
• Fitted with a SIG QD suppressor-ready flash hider, threaded 5/8×24.
• Fitted with a folding stock in a coyote finish.
• Feeds from a 28-round steel magazine, with one included.
• Ships optic-ready, with no fixed sights.

Frequently Asked Questions

Does the stock fold? Yes, the minimalist stock folds for maximum compact storage.

Can the barrel be swapped for a different caliber? Yes, the MCX Spear LT uses an interchangeable barrel system.

Is this rifle suppressor-ready? Yes, it ships with a SIG QD suppressor-ready flash hider.

Buy the Sig Sauer MCX Spear LT 7.62x39mm

A modular, folding-stock 7.62x39mm platform is exactly what the MCX Spear LT delivers. Order it from our Lubbock, Texas gun shop for fast, insured shipping to your FFL.