The Crows Shadow does a show and tell video to help owners of the KWA LM4 PTR Gas Blowback Rifle maintain their GBBR... "Hey everyone in today's video we will be doing Maintenance on a KWA Airsoft LM4 PT. But the main idea is to show basic care of your GBBR, if you have any questions or doubts don't forget to leave a comment down below."