Odin 21” 6mm ARC Barrel, BCG, Adjustable Gas Block Price: $ 275.00 Location: 83607 Reason Ended expired Description: Odin 6mm arc barrel, gas block, gas tube, and BCG. I bought the BCG, Gasblock and 21 inch barrel new as a package from ODIN and paid 535 plus tax. only 10 rounds have gone through it. I would like $275