A projectile launcher capable of optionally repositioning the bolt to a predefined position using a bolt carrier is disclosed. The launcher, in one aspect, includes a bolt, a striker, a bolt carrier, and a ramp. The bolt, in one example, is configured to be able to move within a bolt chamber. The striker having a striker reset hook is able to move in a direction parallel to a moving direction of the bolt. The bolt carrier, having a fastener, a flexible latch, and a bolt repositioning latch, is attached to the bolt via the fastener. The flexible latch is able to latch to the striker reset hook for resetting the striker during a process of launching a projectile. The ramp facilitates disconnecting the flexible latch from the striker reset hook when the flexible latch moves over the ramp.