Firearms WTS: Sig MCX Rattler 300BLK Complete Upper Receiver Group

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Brand new besides 20 rounds through it to function and accuracy check, it's immaculate and has the following upgrades from stock:

1. Geissele MCX Super Charging Handle (brand new)
2. Dead Air Keymo Micro Muzzle Brake (used in 20 round test fire)

Photos (of literally every angle):

Price: $1900 shipped

 

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