Diameter/Length: 36mm (1

The canopy can be assembled open or closed

Shock has air damping: minimal lubricant is needed for smooth shock action

Tooth count: 27

GoatGuns - Mini Under Barrel Masterkey Shotgun Attachment, for AR15/M16A1 Models Upgrade Parts Airplane Tank & Line Diameter/Length: 36mm (1MINIATURE MASTERKEY SHOTGUN MODEL UNDER AR BARREL ATTACHMENT, REQUIRES SMALL INSTALLATION Installation Instructions: Remove front sling loop with included screwdriver. Remove hand guards. Remove bracket from Masterkey. Fit Masterkey under barrel. Front sling loop mount inserts into groove in Masterkey. Position bracket over barrel and onto Masterkey and screw into place with long screw. (Smaller bracket for GoatGun M16 attachment.) Fix larger hand