Sig MCX Rattler Upper 5.5" .300 Blackout

Product Features & Specifications

Sig Sauer MCX Rattler Upper Assembly

• Manufacturer: Sig Sauer
• Model: SIG MCX
• Caliber: 300 Blk
• UPC: 798681587735
• SKU: UAMCX-5B-300-TAP

Sig Sauer Complete 5.5" upper assembly kit for your MCX Rattler in 300BLK. Convert any MIL-SPEC AR Lower into a MCX Rattler. Complete with upper assembly, lower receiver stock adapter kit, side folding AR buffer tube knuckler, and match duo trigger kit.

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