AIP Aluminium High Speed Blowback Housing for Marui 5.1/4.3/1911
Production Model : AIP029-M51S - As many round fired from the pistol, the stock loading muzzle will get old- This part is important for loading each BB from the magazine after slide blow back- Suitable for AIP Product AIP015-M51S-K- As always, upgrading GBB require necessary skill & technique, consult expertise...