This is a 3D Printed M4 barrel extension printed by 3D Cauldron™ compatible with these models. Battlescout ICS-10 Deltatrooper Demolisher 2-In-1 Deploy CS-6 Evader Longshot CS-6 Longstrike CS-6 Infinus IonFire Mediator Modulus ECS-10 RapidStrike CS-18 N-Strike Rayven CS-18 N-Strike Elite Rayven CS-18 Rayven Stinger Recon CS-6 Recon MKII Regulator Retaliator Scravenger N-Strike Spectre REV-5 N-Strike Elite Spectre REV-5 Stryfe Tri-Strike We are not affiliated with nerf or any other brand. This item is 3D printed. 3D printed items may need a little sanding, painting or cleanup. We may leave support material attached to protect the item during shipping. The listing is for the 3D printed parts ONLY! Unless otherwise stated no hardware, electronics, or accessories will be included. Please contact us if you have any questions.