The Airsoft Tavor 21 AEG QD Sling Mount is designed to replace the large rear body pin with one that accepts common QD sling swivels. Would recommend running a two point sling between the Airsoft Tavor 21 AEG QD Sling Mount and a QD sling swivel attachment mounted to the Tavor's top rail. Includes: 1, complete Airsoft Tavor 21 AEG QD Sling Mount with screw. DISCLAIMER: Not compatible with all QD sling swivels. Not compatible with Magpul QD Sling swivels. Sling swivel not included. For EF Tavor 21 competition series; cannot guaranty compatibility with other Tavor series airsoft guns.