Top Shooter CNC Aluminum Magazine Base For Umarex/ VFC Walther PDP GBB Airsoft Action Army In terms of external features

In terms of external features

Fully adjustable waist Size

Revanchist Airsoft Holosun 510C and Universal Optic Mount For Hi Capa GBB Airsoft (Red)

and possibly higher FPS compared to the stock spring action ones

Flip up Front & Rear Sight

Top Shooter CNC Aluminum Magazine Base For Umarex/ VFC Walther PDP GBB Airsoft Action Army In terms of external featuresKey Feature CNC Aluminum Construction Airsoft Magazine Base A metal magazine base helps significantly reduce damage caused when the magazine falls to the ground This magazine base features a 10mm thickness, and its edges are designed with a groove that allows you to grip your magazine more securely, making it easier to pull the magazine from your airsoft pistol without it slipping and falling to the ground Suitable For Umarex VFC Walther PDP Gas Blow