STYLES Tube Model - Barrel band design with integrated pic rail across the top. Choose this style if you have the Tube version of the Avenge-X. Bottle Model - Dual screw clamp design with integrated pic rail on top. Choose this style if you have the Bottle version of the Avenge-X. **Bottle style will not work on tube models due to clearance issues with the foster fitting cap. MATERIAL 3D Printed PETG INSTALLATION Purchase includes 3D printed mount and M3 Mounting Hardware. WARNING! Confirm air gun is unloaded and safe before beginning installation. 1. Remove any barrel accessories from end of shroud (moderators, thread protector, etc) 2. Remove threaded foster fill cap from end of tube (not required for bottle models). 3. Slide assembly over shroud. NOTE: This may be snug and require you to separate barrel band version by pulling out on the sides or squeezing the top and bottom while working it into place. 4. Secure assembly, using m3 screw(s), by hand tightening until snug. Do not over torque! DISCLAIMER The purchase includes only the 3D printed parts. All other objects in photos are for reference only. USE this product at your own risk. EVOLVE 3D, LLC is not liable for damage to your property or person while using this product. WARRANTY We offer a limited lifetime warranty on our 3D printed parts.