NOTE:In Pennsylvania, you cannot use your personal license to carry firearms for any employment that requires you to carry a firearm. The PA license to carry firearms is for self-defense only. For any type of armed employment, you have to be Act 235 certified through the Pennsylvania lethal...
The modularity of the AR-15 means you can buy one rifle, and a selection of other components that can be swapped in and out of the rifle, and have a firearm capable of utilizing multiple calibers for a variety of applications. By swapping upper receivers or changing parts, you can adapt...