It's all about upgrading your stock in the  Building Your Build Episode 3 from Airsoft GI... "We teach you have to remove your stock from your airsoft gun. Seriously..... Well, this is good to know! We also teach you how to remove the buffer tube! This is the last easy upgrade before we get into the more difficult tech work. Don't worry! We will try to show you how to do this as easily as possible! Make sure you subscribe and stay tuned for the next installment!"