This one is a folder. They also make a telescoping one that looks like the telescoping stock on the AR-15. A spring inside it absorbs some of the recoil and I assure that it works. It is not cheap, neither is the Choate stock with the pistol grip, and that does not reduce any recoil.
You bunch of non reading hacks first to reply!
The Barrel on his shotgun is 18 inches. That is LEAGAL. It is as short as it can be.
He has a stock on his shotgun. He does not like the light weight manufacture of the mosberg that lends its self to heavy recoil.
1)Get the choate full length shotgun stock it is solid and has a vertical grip instead of a drop comb. Check out www.AR15.com in the weapons forums. We have a great community.
2) Get a remington 870. It has a steel reciever and is much heavier. It is my choice.
3) OR get four or five slug shells, unscrew the but pad on the hollow factory stock. Put them in the hollow. It adds weight and dampens recoil.
The real problem with the collapsible stocks is also their advantage - low mass. If there isn't mass to absorb the recoil it all flows to the shoulder. I hate the durn things because they beat the heck out of me. YMMV.
As long as I'm opining, I have tried the pistol-grip thing and if I were strong enough to hold that on target for multiple shots I wouldn't need a shotgun, I'd just beat 'em to death. Again, YMMV. ;-)
I own 2 Mossburg 500 shotguns. One of them makes my shoulder black and blue everytime it's fired; the other has almost no kick whatsoever. Except for the year of manufacture (12 years apart) they appear to be identical. It's the newer one that kicks.
These are both the civilian version, not the military (long shell tube) version.