Unleashed Solid Stage 2 Kit for Nerf Elite Alpha Trooper This kit includes Elite Alpha Trooper Breech, Elite Alpha Trooper Bolt Sled, Plunger Rod, Elite Alpha Trooper Trigger, Grease Tube, Plunger O-ring, Breech O-ring, and Bolt Sled Pin. Mod at your own risk! Increasing the spring tension can break or damage stock internal components of your blaster. Blaster not included.