MPX-K PSB: SIG Sauer’s Covert Companion

By Mike Detty

Sig Sauer introduced its MPX submachine gun in 2013 with hopes of capturing some of the law enforcement market that had been long held by the Heckler & Koch MP5. The select-fire gun uses a short-stroke gas piston system and a rotating bolt for increased accuracy and reduced felt recoil. It also possesses completely ambidextrous controls. In 2015, several semi-auto variations were made available to the civilian market with one of the more interesting, at least to me, being the MPX-K PSB.

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Classified by the BATFE as a handgun, the MPX-K PSB has a 4.5-inch barrel, a free-floating KeyMod handguard and a collapsible arm brace. It is a compact personal-defense weapon (PDW) capable of being concealed in just about any briefcase or messenger bag yet easily deployed to provide fast and accurate hits.

Despite its small footprint, the MPX-K PSB is not a lightweight by any means. Though the upper and lower …Read the Rest

Source:: Tactical Life