Sig MCX Rattler Pistol .300 Black Out 5.5″ Barrel M-Lok Handguard

Original price was: $2,299.99.Current price is: $2,069.99.



Sig Sauer

Manufacturer Number:
300 Blackout
Sig Sauer MCX Pistol
Unit of Measure:


When the US Special Operations Command put out a request for a Personal Defense Weapon (PDW) to replace the MP5, Sig Sauer responded with the MCX Rattler; an absolutely groundbreaking short barrel rifle. The Rattler is based on Sig Sauer’s flagship MCX modular rifle, featuring its short-stroke recoil gas piston operating system. What separates Sig Sauer’s MCX platform from other AR/M4 style rifles is the recoil system that totally eliminates the need for a buffertube, making the MCX Rattler more compact than any AR/M4 rifle ever produced. The MCX Rattler PSB (pistol version) has a length of 19.3 inches when arm brace is collapsed and the MCX Rattler SBR has a length of only 16 inches when the stock is folded; both versions of the MCX weigh under 6 lbs. The rifle is currently chambered in .300 BLK features a 5.5 inch suppressor ready barrel and a aluminum free-floated handgaurd with M-LOK attachment points.

Additional Features and Information

Hammer forged carbon steel barrel and three pronged flash hider

Features the Sig Enhanced Trigger

Ambidextrous AR-style controls and dual-paddle bolt-release

M1913 rail from charging handle to muzzle

Two position gas regulator for suppressed or unsuppressed fire

3 position telescoping arm brace (PSB) or folding stock (SBR)

Caliber: .300 Blackout

Weight: 5.1 lbs w/ magazine

Rifle Overall Length: 19.3″

Action: Gas Piston – Semi-Automatic

Trigger: Sig Enhanced

Safety: AR Selector Switch

Rifle Barrel Length: 5.5″

Rifle Barrel Twist: 1:5

Rifle Stock: Pistol Brace

Scope Mount: Picatinny Rail

Magazines Included: (1) 30 Round

Iron Sights No

Caliber or Gauge: .300 BLK

Handedness Right Hand