Ata Arms Neo.

ATA's NEO model is available in 12 gauge, 20 gauge and the increasingly popular 28 gauge. NEO is an inertia operated semi-automatic shotgun designed using the latest technology which, combined with ATA's considerable experience, results in a shotgun whose performance is as good as its appearance is pleasing to the eye. The NEO inertia system is simple and comprises of only three primary parts: the bolt body, the inertia spring and the rotating bolt head. Simple is better. With a greatly reduced mass of parts the inertia system can cycle faster. Gas, burnt powder and other residues remain in the barrel where they belong, rather than being channeled into the shotgun's mechanism, as they are in gas systems. The strong steel locking lugs of the inertia system's rotating bolt head ensure the tightest possible lock up between the bolt and the barrel. The bolt head's rotating lugs not only lock steel to steel into the shotgun's barrel but the lugs lock in even tighter during firing. With the inertia system being much cleaner in operation, cleaning the NEO takes only a fraction of the time it can take to clean a gas operated shotgun. Not only is the inertia system incredibly simple, it's also light in weight; this allows NEO shotguns to be some of the lightest semi-automatic shotguns ever produced.