Guarder Bore-Up Cylinder Set for TM SIG-551/552 Category_Switch Assembly HOP UP is equipped and

HOP UP is equipped and located inside the Front of handguard (Pull up the Trigger to adjust HOP UP)

(1) 25 rounds Magazine

Realism lock-bolt function which stops the gun from firing after last BB fired

Dimension: 146(L) x 30(D) mm

Polymer Slide / Frame and Barrel Assembly (Looks convincingly realistic)

Guarder Bore-Up Cylinder Set for TM SIG-551/552 Category_Switch Assembly HOP UP is equipped andThe Bore Up Cylinder Set needs with M120~M170 Spring. Include: Stainless Bore Up Cylinder Head Bore Up Air Seal Nozzle Bore Up Ventilation Piston Head Bore Up Chromium Plating Cylinder Material: S303 Stainless Steel Brass Polycarbonate Acetal Item No.: GL 03 30