A needle tip assembly for a pre-loaded syringe or a pen needle injection device, wherein the needle tip assembly comprises a needle mounted to a needle support. A body is sized and configured to receive therein the needle support and the needle. The body comprises a front portion, a rear portion, and an overall axial length that is greater than an axial length of the needle. Prior to the needle tip assembly being in an installed condition on the pre-loaded syringe or the pen needle injection device, each of the front portion covers a first puncturing end of the needle and the rear portion covers a second puncturing end of the needle. Prior to removal from the pre-loaded syringe or the pen needle injection device, the body is at least axially movably relative to the needle support to a position the front portion covers the first puncturing end.
