Sig Sauer MCX Rattler Upper 300 Blackout AR Conversion, 5.5" Barrel

Description: Sig Sauer MCX Rattler Upper 300 Blackout AR Conversion, 5.5" Barrel. This upper Sig Sauer MCX Rattler AR conversion kit with a 5.5" barrel length comes with everything needed to put on any standard MIL-SPEC AR lower. This conversion kit includes: a 5/8" x 24 threaded barrel, a complete bolt carrier group, a Sig Sauer MCX upper, side folding AR buffer tube knuckler, 90 degree muzzle adapter for standard non Sig Sauer suppressors or muzzle devices, AR Two-Stage Matchlite DUO trigger kit and 1913 low profile QD socket with hardware.

The SIG Matchlite Duo trigger unit provides a crisp and clean feel, and a new tapered bolt lug design extends bolt life while resulting in smoother cycling. The MCX Rattler upper receiver assembly features a standard free-floating M-LOK handguard with a top picatinny rail for sight and optic, as well as a short-stroke piston system and unique internal recoil system that eliminates the M4-style buffer tube resulting in a light-recoiling and compact platform able to be configured for any task.

• Hard coat anodized finish
• Aluminum M-LOK handguard
• Tapered bolt lug
  
• 5.5" long barrel 
• 5/8" x 24 TPI Threads
• Flash Hider

Includes:

• MCX Rattler Upper
• Side Folding AR Buffer Tube Knuckler
• 90 Degree Muzzle Adapter
• AR Two-Stage Matchlife DUO Trigger Kit
• 1913 Low Profile QD Socket with Hardware
• 300 Blackout BCG

All NFA/ATF Rules Apply! Installing this conversion kit on a non SBR (Short Barrel Rifle) will require you to register the rifle per NFA regulations.

Manufacturer: Sig Sauer

PRODUCT SPECIFICATIONS:

• Barrel Length: 5-1/2"
• Barrel Thread Pitch: 5/8" x 24 TPI
• Brand: Sig Sauer
• Caliber: .300 Blackout
• Finish / Color: Black
• Firearm Type: Pistol,Rifle
• Material: Steel,Aluminum
• Models Fit: AR-15,Sig Sauer SIG516,Sig Sauer M400