I am going to buy a new shotgun and I have narrowed the choices down to 2: Mossberg 12 Ga/18 1/2" Barrel/Cylinder Bore/Ghost Ring Sight for Sale at Buds Gun Shop $638.00 Anyone know how dependable this gun is being a semi-auto? I have a short reach so I am somewhat concerened with the stock. Mossberg 590A1 Special Purpose 12ga 20" 6 Pos. Stock GR Sights for Sale at Buds Gun Shop $555.00 I have a very short reach so this may work good with the adjustable stock. what do you guys think?