LCT Airsoft have a suggestion for enhancing the LCKS74UN:
Waiting for your Modularize idea for LCKS74UN!!
LCKS74UN MODULARIZE video→ https://www.youtube.com/watch?v=MSZ2K-NJHLo
Please do not hesitate to contact LCT dealers if you need further information, http://www.lctairsoft.com/webe/html/dealer/index.aspx
LCT Airsoft