A breaching attachment does two main things, it holds the muzzle in place against a door jamb or lock, and it allows the barrel to vent pressure when fired with the muzzle stuck against something. Obviously, sticking a bare muzzle in a door jamb is going to partially obstruct the barrel and can cause a barrel to rupture. A breaching attachment provides that needed venting and and standoff distance to prevent the barrel from bursting.
The improvements we made with our design is using square teeth which is less prone to snagging on gear/clothes, but bites into door jambs far better than standard point teeth. We also incorporated the features from our KA-1212 brake/suppressor unit to give it the capability of shooting tight groups (something most breaching shotguns can't do), reduction of recoil, and elimination of flash. This allows a breaching shotgun to be used for normal uses as well instead of just breaching. This allows the breacher (man, not the attachment) to be able to breach the door and accurately engage any threats on the other side. This improves group effectiveness and reduces collateral damage and unintended injuries. Generally, a 12" barrel with a KA-1212BR installed will shoot similar patterns as a 20" standard barrel will. It also will do it with near-zero muzzle flash
We spent a lot of time and money developing the part and testing it, and in turn, managed to get a lot more performance out of it than other breaching attachments that are on the market. I'd bet that we spent more time and money developing our KA-1212BR than any other company has on their attachments. We've even tested them for use with 'bird bombs' and less-lethal munitions to make sure that there are no performance or reliability problems. By the time it hit the market it was a completely debugged and ready-for-duty part. They've been available on the market since '07 and we've had ZERO failures of any kind with them, they are built to take a lot of abuse.
