APS M4 Complete AEG Gearbox Guide
OptimusPrime
07 Aug 2016
Learn more about the Gearbox of the APS M4 AEG in this video from Team Blacksheep... "In this video Brian will take apart the APS M4 SD in a step by step guide and put it all back together. This is a current and standard APS M4/M16 so it will help you out with all the other APS M4 rifles out on the market now."