The arsenal later manufactured rifles, muskets, carbines, and flint blunderbusses for cavalry in 1809. The armory also produced rifles, muskets, carbines, and flint blunderbusses for cavalry in 1809. Patent Arms produced smoothbore revolving carbines and shotguns. Nonetheless, shotguns are far less common in military use than rifles, carbines, submachineguns, or pistols. The U.S. military uses the Vortex Flash Hider on M4 carbines and M16 rifles. Some cavalrymen such as the chasseurs were also armed with firearms, primarily carbines or pistols. In addition to rifles and carbines, the police also sometimes carried revolvers. Pilots quickly began firing hand-held guns at enemy planes, such as pistols and carbines. Submachine guns were originally about the size of carbines. Development of lighter assault rifles continued, matched by developments in even lighter carbines. It is one of the Bushmaster XM15 line of rifles and carbines. The "Broomhandle" Mauser carbines and MP 40 machine pistols were favored by opponents. After its introduction, it was quickly adopted for carbines and rifles. In sieges, they were often used to assault breaches carrying flintlock carbines and grenades. M91 TS carbines ("moschettos") under their "Italian carbine" ad.