So Ive been interested in getting an AR15 for about a year now and I finally decided I was going to buy a complete upper and build the lower. I started buying parts recently and the only things I still need are the complete upper and stripped lower. Yesterday I get an email that the lower I want will be in stock today. I wait at my computer until I can order it and right before I finalized the purchase I see that it says I must be 21 to buy it. I had never heard this so I chat with customer service and am informed that because it could be made into a pistol I must be 21. Within 15 minutes the lowers are out of stock and now Im trying to figure out how I can get this project done. Been waiting forever because stuff is so hard to find and now this setback.