Hey Guys, A friend of mine has a Rem 870 shotgun that has a 28"bbl. He would like to shorten it to 20" by cutting it? Is there anything legally that he should worry about? I understand the the bbl has to be longer than 18" inches, but I wasn't sure if it was legal to cut ANY bbl down. Thanks for your info. It is appreciated..

From a legality standpoint, 20 inches on an 870 is fine.  

OAL issues would arise if he had a break action shotgun (such as a side-by-side), but this obviously does not apply.

Colt, I would recommend to your friend that he would be better off buying a 18" factory barrel from Remington, or Mossberg who also make 870 barrels, than cutting down the 28. If he cuts down the 28, the barrel will have no choke at all and might not shoot full, consistent patterns. The barrel will run about $100 bucks and will be legal, have a front sight and will be choked inproved cylinder. He would still have the 28" for hunting or shooting clay birds. MIKE.