I've got one Knoxx SpecOps adjustable stock for a Remington 870. The stock has barely been used, probably less than 50 rounds fired. The stock also has the Knoxx Power Pack, which has a watertight storage compartment, 5 shell rings, and an adjustable cheek weld (all cheek risers that came with the stock are included)
$100 OBO for the complete setup, Money Order preferred for payment. Regarding trades, will consider AR Parts (Smith Vortex, Certain folding BUIS, BCM Gunfighter CH, Spare AR Parts) and others. PM me for details or with any trades you may have.
I also have a stock pump forend for a remington 870, Make me an offer.
Thanks so much!