The SIG Sauer MCX is a semi-automatic rifle built on the MCX platform, chambered in 7.62x39 with a 16-inch barrel. The folding stock brings the overall length down for storage and transport, and the rifle feeds from a 28-round magazine. It comes finished in black across the receiver and furniture, giving the whole rifle a uniform look that carries through every part of the build. 
 

Key Specifications 

• Brand: SIG Sauer 
• Model: MCX 
• Caliber: 7.62x39 
• Action: Semi Auto 
• Capacity: 28 Rounds 
• Barrel Length: 16 inches 
• Stock: Folding 
• Finish: Black 
   

Detailed Features 

• 16-inch barrel balances portability with 7.62x39 ballistic performance 
• Folding stock reduces overall length for storage and transport 
• Semi-automatic action cycles the 7.62x39 chambering 
• Feeds from a 28-round magazine for extended range use 
• Black finish is consistent across the receiver and stock

Owners of the SIG MCX generally report dependable cycling in 7.62x39, and the platform's piston system has a reputation for shrugging off harder-kicking steel-case ammunition that gives some rifles trouble. Fit and finish on SIG's rifles draws consistent praise, though a handful of owners mention tuning the gas setting for different loads.

The folding stock makes the MCX easy to store in a case or safe, and owners like being able to run the rifle with the stock folded in a pinch. Handling in 7.62x39 feels lively thanks to the shorter barrel, and shooters coming from other platforms tend to appreciate the ergonomic controls.

The MCX platform has broad aftermarket support for stocks, handguards, and optics mounts, which owners like for building the rifle out to taste. Buyers weigh the higher price against SIG's reputation for build quality, and most who buy in feel the premium is justified by the fit and reliability.