Caa roni carbine conversion for g17/18 (black)

New polymer and metal made conversion kit
best match with ksc/we/marui gas models
retractable stock with sling ring and front folding grip
striker flash hider with double side rail to store laser or torch
rear vane to hold spare magazine
weight: 400g
ps: pistol is not included

minimum technicians required
please follows instructions while installation