Another howto video from Evike.com showing you how to replace and put in the CO2 cylinder into the APS CAP CO2 Pistol Magazine... "The Combat Adaptive Pistol or CAP is the CO2 powered sidearm offering from APS. The CAP features an ergonomically molded polymer frame, with lightly textured grip panels, providing a comfortable and effective non-slip grip.

Tutorial video from PTS Syndicate how you can install their fully licensed PTS Kinetic MREX SCAR Rail... "Video is using Cybergun FN SCAR-H GBB as sample. The installation will have slightly different between Cybergun and other version of SCAR-H / SCAR-L AEG or GBB. If you are not familiar with your airsoft SCAR, please find your local gun smith for installation.

PTS is not responsible for any damage that may arise from improper installation."

A tutorial video from Airsoft Master on the Rail and Outer Barrel of the G&G Combat Machine Raider. If you need one, they are happy to sell you one as they have this AEG in stock at their store... "Easy step by step instructions on how to remove and re-install G&G Combat Machine Raider Series rail and outer barrel."