Surgical instrument with fastener preload lock-out

A lock-out for a surgical instrument including an elongated shaft, a stack of fasteners located within the elongated shaft, and a fastener deployment system to deploy a fastener from the elongated shaft, the fastener deployment system configured to apply a preload to the stack of fasteners, the lock-out comprising:

• a grip handle configured to be grasped and manipulated to attach and detach the lock-out to and from the elongated shaft, the grip handle including first and second sides;
• and
• a first pair of opposing clip fingers and a second pair of opposing clip fingers, the first and second pairs of clip fingers configured to receive the elongated shaft therebetween and engage an exterior surface thereof, each of the first and second pairs of clip fingers includes a first clip finger and a second clip finger, the first clip fingers being located at the first side of the grip handle and the second grip fingers being located at the second side of the grip handle, the first grip fingers being spaced a first distance from each other and the second grip fingers being spaced a second distance from each other, the first and second distances being different from each other.