Size: Inner dimension = 7.5mm Outer dimension = 9.5mm Your choice of 27.5cm, 30cm, 35cm or 50cm   Included: 1 x Aluminium Barrel (Length of your choice)   *Random colour

The best Piston available! Full metal rack with a single o-ring metal head.   Compatible: M4A1 Gen 8 Scar V2 MP5 V2 M249 Saw V3 M4A1 Gen 9 Kriss Vector V2 ACR J10   Included: 1 x Piston with Full Metal Rack and Head

Brass cylinder head, Brass Nozzle, Double O-Ring. What more could you ask for?    Compatible: This cylinder head is compatible with all blasters that use a Gen 8 and Gen 9 gearbox   Included: 1 x Brass Cylinder Head with Double O-Ring 1 x Nozzle

Give your blaster more of a punch!   Included: 1 x 1.4mm Steel Spring

Looking at adding an 11.1v battery to your blaster? These standard metal gears will handle an 11.1v battery with ease.   Compatible: M4A1 Gen 8 Scar V2 MP5 V2 M249 Saw V3 M4A1 Gen 9 Kriss Vector V2 ACR J10   These gears are compatible with all blasters that use a Gen 8 or Gen 9 gearbox.   Included: 1 x Full Metal Gears Kit

Compatible: This trigger is compatible with all blasters that use a Gen 8 gearbox   Included: Gen 8 Metal Trigger [V2]