A rifle is a firearm with a barrel length greater than 16 inches. A Short Barreled Rifle (SBR) is a rifle with a barrel shorter than 16 inches. An SBR is less effective than a rifle but more effective than a handgun for self-defense. It is also more efficient for traversing close quarters to clear a threat from your place of residence such as a burglar, etc. As of right now, you can purchase a bull-pup rifle or rifle with a folding stock which is, in most cases, shorter in over all length than a SBR. The need to register an SBR (and Short Barreled Shotgun) is unjustified and the requirement should be removed.