A SIG MCX-SPEAR LT bolt and recoil spring assembly ... Unlike AR-15 designs, which require a fixed receiver extension to house the buffer and recoil spring, a design like the MCX that follows ...

the MCX VIRTUS utilizes the proven SIG Sauer short-stroke piston system and unique internal recoil system that eliminates the M4-style buffer tube. The result is a compact, light-recoiling ...

SIG Sauer’s new MCX-SPEAR fires bullets with twice the kinetic energy of those from an AR-15. That means double the horrifying force that mangled the victims of the mass shooting in Uvalde ...

The Sig Sauer MCX Virtus Patrol (chambered in 5.56 ... That means the Virtus Patrol doesn’t require a buffer tube. Less weight slamming back equals less recoil. Plus it can increase reliability.

Hot off its new contract with the U.S. Army, Sig Sauer has ... s popular line of MCX gas-operated piston AR-15-style rifles. But MCX has the benefit of not needing a buffer tube in the stock ...