GP-20 x M203 for ris

projeck use not changed files V3_frame_B and V3_grip

materials
m3 15mm x 6
m3 13mm x 3
m3 16 with head x1
m5 40mm with nut
2mm micro-cord 50mm
fi 2mm 13mm nail or rod for pin
3 spring's from automatic ballpiont pen
1 spring from v3 seafty plate
oring 2mm x 10mm
glue

1 connect lever and trigger with cord
2 add to breach block: spring with fireing pin, ejeckt buton with spring and 16mm m3 and seafty lock with spring from v3 gb
3 add to the breach block first front frame and then trigger with lever (pin them with bottom pin and seafty pin)
4 back frame with spring scerw and pin with front frame 13mm m3 and fi2mm 13mm
5 grip with back ris screw with 2 13mm m3
6 screw barrel with mount and add grenade lock with oring
7 glue it on ris barrel with mount to be straight (use ris to ris adapter with 5mm bolt and nut)

you can add a ring to the front of the grenade to stabilize it