I notice in publicity photos of ballistic door breaching, police or soldiers who do the job use a shotgun at close range, reportedly with a special frangible "Hatton" shell or just buck/birdshot. Breaching round - Wikipedia, the free encyclopedia Do police/soldiers generally frown on shotguns for CQB work? If so, why? Have police/soldiers used this for door breach during CQB work to still retain the use of an AR/SMG? M26 Modular Accessory Shotgun System - Wikipedia, the free encyclopedia I just notice that the guys using SGs to breach the doors have their SMGs slung over their shoulder, and if they thought a SG was adequate for CQB they'd be using that as their door breach and primary weapon instead of carrying a SMG too. Have people tried using these sorts of frangible rounds for door breaching, and if so how effective are they? Glaser Safety Slug - Wikipedia, the free encyclopedia Is there a market out there for an invention that enables police or soldiers to be able to door breach in a single shot with an assault rifle, SMG or even a pistol with minimal overpenetration and weight encumbrance?