Description 1.Compatible with Worker Folding Buffer Tube,F10555 Straight Buffer Tube and 29-32mm Diameter Buffer Tube. 2.This SBR stock can attach on Worker Folding Buffer Tube,Easy to disassemble and freely retractable. 3.Notes:This procuct only included SBR Stock Attachment,Beware of you had a buffer tube before you purchased! 4.Suitable for people over 14 years old. 5.Blaster and buffer tube not included!Specifications Model: SBR Stock Attachment Color: Tan Process:Injection Material:Nylon Package Weight: 150g Package Size:120×180mmPackage included