COWCOW Technology Aluminum CNC Tactical Magbase for Marui Model GBB Pistol (Silver)
Aluminum material with CNC machined
Shifting pin holding system can latch the magazine tightly
Special groove design offer plenty of grip
Easy to attach and detach from the magazine.

It may has a condition that your pistol cannot feed the BB bullet due to lightweight gas supply. You just simple remove a spacer to solve the issue. Alternatively, you may consult your gunsmith for advancing fitting to solve this issue as well.

Increasing in FPS can be achieved; however, it may require other parts to collaborate and advanced skill is needed. improper installation / fitting can shorten the life of the product.