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


  • SKU:798681600182
  • Brand:Sig Sauer
  • Manufacturer Number:PMCX-300B-5B-TAP
  • Caliber:300 Blackout
  • Model:Sig Sauer MCX
  • Rounds:30
  • Unit of Measure:Each
  • Classification:Firearm
  • Interests:AR-15 Pistols, New for 2019, Black Friday
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Category: Product ID: 7708


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


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. Order Sig Sauer MCX Rattler Pistol .300 Black Out 5.5″ Barrel M-Lok Handguard Near Me

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)


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