Command Arms Accessories have developed a new Remington 870 and Mossberg 500 stock and forend.
The stock features a collapsible M4-style stock, pistol grip, aluminum buffer tube and picatinny rails for optics. There also appears to be a rail on the side of the stock, although I am not sure what could be attached there.
On a Mossberg 500
The new forend features a lower rail, which could be used to mount a forward handgrip, and side rails for lights or lasers. I like the grip design.
Hat Tip: Tactical Life