The 43 defense consists of 4 down linemen, 2 outside linebackers and 1 middle linebacker.
The 43 defense is not a very common defense in youth football, because it only has 7 defenders in the box. This doesn’t mean it is a bad defense. The 43 defense consists of 4 down linemen, 2 outside linebackers and 1 middle linebacker. The secondary has 2 cornerbacks, along with a free and strong safety.