M400 Switchblade Rifle Caliber Pistol — New from Sig Sauer

Sig Sauer just added a fifth model to the M400 series, and this one has features that were purpose-built for competitive shooters. The M400 Switchblade is a rifle-caliber AR pistol with several ambidextrous controls, 2-stage Matchlite Duo Trigger, free-float M-LOK handguard, and the new Magpul BSL brace which is adjustable for length.

Sig Sauer M400 Switchblade
The Switchblade has an 11.5” barrel, Magpuls’ all-new BSL brace (not shown), full ambi controls, twin locking clamp handguard, match-grade flatblade trigger, and a Cerakote Titanium finish.

“The M400 Switchblade brings an entirely new level of performance to the M400 product family with unmatched flexibility and capability,” said Tom Taylor, Chief Marketing Officer and Executive Vice President, Commercial Sales, Sig Sauer, Inc. “The pistol features fully ambidextrous controls to include the charging handle, selector, and unique to the Switchblade, the bolt catch and release for seamless transitions from hand to hand and rapid deployment of the catch. Additionally, the new Magpul BSL brace offers improved stability, and the rigid handguard is designed to withstand the weight of maximum accessory installation, truly making the M400 Switchblade the ultimate performance pistol.”

As described by Sig:

Sig Sauer is pleased to announce the expansion of the M400 series with the introduction of the Sig Sauer M400 Switchblade, which brings the performance features of the popular M400 SDI platforms — that were purpose-built for competition shooters – to this rifle caliber pistol.

The Sig Sauer M400 Switchblade is an aluminum frame rifle caliber pistol featuring a Cerakote Titanium Elite finish, with a telescoping Magpul BSL Brace, an 11.5” cold hammer-forged carbon steel tapered barrel for easy suppressor installation with a three-prong flash hider, and a rigid free-floating handguard with M-LOK accessory rail that installs with a clamp system and designed to eliminate deflection from the added weight of accessory installation. The pistol offers fully ambidextrous controls including the bolt catch, charging handle, and selector switch, has a 2-stage Matchlite Duo Trigger, and comes optics-ready. The pistol is chambered in 5.56 NATO and ships with a thirty-round magazine.

Watch the product launch video:

M400 Switchblade Specs

  • Overall length: 30 inches
  • Overall height: 7.5 inches
  • Overall width: 2.5 inches
  • Barrel length: 11.5 inches
  • Barrel twist: 1:7

M400 Switchblade Features

  • Ambidextrous Bolt Catch
  • 2-Stage Matchlite Duo Trigger
  • 11.5″ Carbon Steel Barrel
  • Cerakote Elite Finish
  • Magpul BSL Brace
  • Free Floating Handguard
Sig Sauer M400 Switchblade features
The M400 Switchblade features an ambidextrous bolt catch (top left), 2-stage Matchlite Duo Trigger (top right), and 11.5″ carbon steel barrel (bottom).
Stephanie Kimmell is the firstborn daughter of Missouri's Pecan King, worthy scion of a Vietnam veteran sailor turned mad engineer-orchardist-inventor-genius. With a BA in technical writing, she freelances as a writer and editor. A Zymurgist greatly interested in the decoction of fermented barley and hops, she is in many ways a modern amalgam of Esther Hobart Morris, Rebecca Boone, and Nellie Bly. She hunts, fishes, butchers, and cooks most anything. When not editing or writing, she makes soaps and salves, spins wool, and occasionally makes cheese from cows she milked herself. Kimmell is a driven epistemophilic who loves live music and all sorts of beer.

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