Sig Sauer M400 SDI X-Series 5.56 NATO 11.5" 30+1 Semi-Auto Pistol

The Sig Sauer M400 SDI X-Series is a compact AR-platform pistol chambered in 5.56 NATO. Designed for both left- and right-handed shooters, it pairs an ambidextrous safety lever with a reduced-angle AR-compatible polymer pistol grip for intuitive handling from either shoulder.

At the core sits an 11.50" chrome moly steel barrel finished in FNC black, fitted with a 1:7 rifling twist and threaded at the muzzle for muzzle devices. The barrel is housed in an anodized M-LOK handguard that accepts lights, lasers, and foregrips. Iron sights are not included.

The M400 SDI X-Series ships with one 30-round detachable magazine, giving the pistol a 30+1 capacity. It runs on a steel threaded buffer tube topped with a synthetic pistol brace, producing an overall length of 30.20" and a weight of 5.80 lbs.

From defensive applications to a versatile range build, the M400 SDI X-Series brings Sig Sauer's manufacturing quality to a short-barreled AR pistol configuration. New from Sig Sauer.

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