Sig Sauer MCX-SPEAR 7.62 NATO (7.62x51) 16-inch Semi-Auto Rifle, Coyote Tan, SR-25 Pattern Compatible
The Sig Sauer MCX-SPEAR in 7.62 NATO pairs a 16-inch barrel with a short-stroke gas piston system, dual charging interfaces, and fully ambidextrous controls. It features a two-position adjustable gas valve for normal or suppressed use, a side-folding adjustable stock with an internal recoil system that allows firing when folded, and a full-length MIL-STD-1913 top rail. This U.S.-made, coyote-tan configuration reflects the platform’s lineage to the U.S. Army XM7 program and includes two 20-round SR-25/LR-308 pattern magazines.
Condition
Overall Condition: Very good condition, showing only light, superficial signs of prior handling or use.
Bore Overall Condition: Excellent - Clean, mirror finish, no signs of wear.
Bore Rifling: Excellent Rifling - Sharp lands and grooves.
Specific Condition Notes: This firearm is in great shape. Minor, superficial scratches and blemishes are present from prior handling.
What’s Included
- Sig Sauer MCX-SPEAR 7.62×51 NATO rifle
- Two 20-round Magpul PMAG LR/SR Gen M3 polymer magazines (7.62×51)
This MCX-SPEAR uses a semi-automatic, short-stroke gas piston with a rotating bolt, delivering consistent cycling across conditions. A two-position gas valve lets the user tune the rifle for normal or suppressed operation, adding practical flexibility without changing parts.
Ergonomics and control are central to this configuration. It provides fully ambidextrous controls including the safety selector and bolt catch, plus dual charging options: a rear AR-style handle and a left-side non-reciprocating charging handle. These features support efficient manipulation from either shoulder.
The rifle’s barrel is threaded and fitted with a three-prong flash hider, and it sits under a free-floating aluminum M-LOK handguard for accessory mounting while maintaining barrel independence. A full-length MIL-STD-1913 top rail runs across the coyote-tan aluminum receivers and handguard.
The side-folding stock uses a 1913-interface hinge and offers adjustable length of pull. Thanks to the robust internal recoil system, the MCX-SPEAR can be fired with the stock folded. The platform accepts SR-25/LR-308 pattern magazines, and this example includes two 20-round PMAGs.
Built in the USA and finished in coyote tan across the receivers, handguard, stock, and grip, this recent-release MCX-SPEAR reflects the model lineage tied to the U.S. Army XM7 program while delivering a 20+1 capacity in 7.62 NATO from a 16-inch barrel.