I'm looking to pick up a second hand M1S90. It will be my first shotgun. It has a ported /compensated 26" barrel, ghost ring sights, and a weaver base on the receiver. Seller is asking $675. The gun is in excellent condition. Is this a good price? Is this a "practical"? It does not have a pistol grip stock. Would it be legal for me to put one on?
TIA