The Sig Sauer MCX-R rifle in 5.56 NATO with a coyote-finished M-LOK handguard (brand part no. RMCXR556N16B) builds on the MCX platform’s short-stroke gas piston system with a 16-inch barrel and a fixed stock configuration. Sig Sauer ships the rifle with an included 10-round magazine and no fixed sights, ready for the optic of your choice. Among semi-auto rifles, the MCX-R favors shooters who want Sig’s proven piston-driven MCX platform in a fixed-stock configuration.

Key Specifications

• Chambered in .223 Rem/5.56 NATO.
• Operates as a semi-automatic rifle on the MCX platform.
• Features a 16-inch barrel.
• Rate of twist is 1-in-7.
• Ships with an included 10-round magazine, for a 10+1 capacity.
• Ships optic-ready with no fixed sights.
• Built with a coyote-finished M-LOK handguard.
• Overall length is 39.1 inches.
• Shipping weight is approximately 10.75 pounds.

Frequently Asked Questions

What platform is this rifle built on? Sig Sauer’s proven MCX piston-driven platform.

Does this rifle include sights? No, it ships optic-ready with no fixed sights.

Buy the Sig Sauer MCX-R Rifle

Sig’s proven piston-driven MCX platform in a fixed-stock configuration is exactly what the MCX-R delivers. Order it from our Lubbock, Texas gun shop for fast, insured shipping to your FFL.