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August 22, 2017

FIRST LOOK: Sig Sauer MCX Rattler, the ‘World’s Smallest Rifle’

Built for elite military units, the Sig Sauer MCX Rattler and its sub-6-inch barrel is billed as the 'world's most compact rifle.'

Dave Bahde

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Photo by Sig Sauer

EXCLUSIVE: First Look at the Incredible Sig Sauer MCX Rattler
Athlon Outdoors author David Bahde with the all-new Sig Sauer MCX Rattler.

Sig Sauer MCX Rattler release brass Sig Sauer Rattler

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Photo by Sig Sauer

EXCLUSIVE: First Look at the Incredible Sig Sauer MCX Rattler

Sig Sauer MCX Rattler release ammo Sig Sauer Rattler

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Photo by Sig Sauer

EXCLUSIVE: First Look at the Incredible Sig Sauer MCX Rattler

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Photo by Sig Sauer

EXCLUSIVE: First Look at the Incredible Sig Sauer MCX Rattler
Author David Bahde with the all-new Sig Sauer MCX Rattler.

Sig Sauer MCX Rattler release bag Sig Sauer Rattler

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Photo by Sig Sauer

EXCLUSIVE: First Look at the Incredible Sig Sauer MCX Rattler

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Photo by Sig Sauer

EXCLUSIVE: First Look at the Incredible Sig Sauer MCX Rattler
Athlon Outdoors author David Bahde with the all-new Sig Sauer MCX Rattler.

Sig Sauer MCX Rattler release range Sig Sauer Rattler

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Photo by Sig Sauer

EXCLUSIVE: First Look at the Incredible Sig Sauer MCX Rattler
The Sig Sauer Rattler at the range with Athlon Outdoors contributor Dave Bahde.

We recently got some exclusive test time with Sig Sauer’s latest rifle: The MCX Rattler.

It is one of, if not the shortest, AR platform rifles available to date with a sub-6-inch barrel. Designed as a compact close quarters rifle, it packs a punch. The MCX operating system allows firing while folded. Its stock provides access to all controls.

Available as an SBR, it will be available as an upper for any MCX lower. A proprietary gas block allows use in 300 BLK suppressed and unsuppressed, with both super and subsonic ammunition. A 5.56mm version will be available for unsuppressed fire only.

“Built for top-tier units, the short-stroke piston design eliminates the bugger tube, yet maintains familiar M4 controls,” according to Sig.

Spending time on the range with the MCX Rattler, mine was tested with both super and subsonic loads unsuppressed and it ran everything well. Accuracy was excellent at 50 yards on 4-inch round plates. Some full-auto time using 125 grain FMJ full power ammunition quickly explained the “rattler” moniker. It was a handful and some serious fun!

Scroll through the gallery above and be sure to watch the quick video below to see the MCX Rattler in action.

For more on the Rattler and other products from Sig, please visit SigSauer.com.

MCX Rattler Specifications

Caliber: 300 BLK
Frame Material: 7075 T6 aluminum
Frame Finish: Anodized
Barrel Material: Carbon steel
Barrel Finish: Nitride
Sights: Optics ready
Trigger: SIG Enhanced
Overall Height: 8 inches
Overall Width: 2.8 inches
Barrel Length: 5.5 inches
Barrel Twist: 1:5 inches
Overall Length: 19.3 inches
Weight with Magazine: 5.1 pounds
Trigger pull: 5.5-9 pounds
MSRP: $2,727 (SBR model)

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