This is a big quality magazine fed 50BMG. Unlike the majority of these that you find that have the safety harbor upper and a standard AR lower, this one is a full safety harbor upper and lower complete rifle. The difference is AR 15 low receivers flex and impact accuracy negatively. This lower is built to eliminate flexing. The magazine holds five rounds and it also comes with approximately 60 Of 50 BMG ammo. The scope is not included, but the bipod is. This is an incredible package.