grip adaptor for Well MB-06 Spring Sniper Rifle (Softair) to mount standard M4 grips (right)

Hi folks,
I'd like to share a thingi I designed for my own purpose. It's an adaptor to mount a standard M4 grip I bought (Panther Sniper Style) to my ASG Urban Sniper Rifle (also known as Well MB-06 and ASR Echo 1).
It consists of two halfes (left and right one) and uses 4 pins (mandatory; diameter 2 mm, length 4 ... 6 mm) and 2 new screws with nut and washer, M5 (I used M5 x 30 hexagon head). Maybe you need to do some minor adjustments, depends on the grip, you're planning to use. Feel free