Ati 410 magazine 5rd is designed only for use with 2 1/2" shotgun shells.*note- the omni hybrid 410 shoutgun only works with 2 1/2" shotgun shells.Some manufacturers 2 1/2" shells are actually longer than 2 1/2" and may not operate in this gun.Please check the length of your shells prior to attempting to fire them.The omni hybrid 410 shotgun only fires 410 ga cartridges.Do not attempt to fire other calibers of ammunition through this firearm.Other cartridges such as 45lc or 45-70 will not operate with this firearm and may cause damage to the shotgun and harm to the operator if attempted.Magazine will not function with safir brand t-14 upper previously imported by american tactical.Caliber: 410 GaCapacity: 5rdFinish: BlackModel: Omni HybridMaterial: PolymerType: DetachableModel Fit: Omni Hybrid MaxxBrand Fit: ATICapacity: 5Magazine Restrictions: The following states have magazine restrictions. Your order will not ship to those states if in violation of these laws and will be subject to cancellation and a 15% restocking fee. California - Limited to 10-round capacity. Connecticut - Limited to 10-round capacity. Colorado - Limited to a 15-round capacity. Delaware - Limited to 17-round capacity. Hawaii - Handguns limited to 10-round capacity Illinois (Cook Co, Aurora, Highland Park) - Pistol mags are limited to 10 rounds. Massachusetts - Limited to 10-round capacity. Maryland - Limited to 10-round capacity. New Jersey - Limited to 10-round capacity. New York - Limited to 10-round capacity. Road Island - Limited to 10-round capacity. Vermont - Handguns limited to 15-round capacity, Rifles limited to 10-round capacity. Washington DC - Limited to 10-round capacity. Washington - Limited to 10-round capacity.