When Mossberg set out to create a dedicated shotgun for youngsters and small-statured shooters we didn't just slap a smaller stock on our legendary 500 and call it good. Instead, our engineers made everything smaller and created what is arguably the world's smallest fully-functional pump-action shotgun. Available in either 20 gauge or .410 bore, the Mini features an 18.5-inch vent-rib barrel with dual-bead sights. Parents don't have to worry about their young shooter growing out of this gun too quick, the adjustable classic stock can be adjusted from 10.5 to 11.5-inch length of pull so the Mini can grow with your child. This adjustability also helps provide a proper fit for young shooters and allowing for a more safe and enjoyable shooting experience. Weighing in at 5 pounds and only 34.75-inches long, the 510 Mini proves that big things do come in small packages!