Maple Leaf 6.02 Inner Barrel for GBB 510mm

6.02 Inner Barrel for GBB 310mm

6.02 Inner Barrel for GBB 410mm

6.03 GBB Inner Barrel 117mm

6.02 Inner Barrel for GBB 470mm

6.04 Crazy Jet Inner Barrel for KWA M4 GBB 440mm

6.04 Crazy Jet Inner Barrel for GBB 250mm

6.03 GBB Inner Barrel 113mm

6.04 Crazy Jet Inner Barrel for GBB 640mm