Come on.... Seriously..
Many of us have made our own M203's, each person has a right to pride in his or her own work, but come on man... that looks like you spent all of five minutes on it, and then posted it to try and get a reaction from us, whatever that was, hope you like it. If you think wood is stronger then plastic you are kidding yourself. Try searching around the internet for a while it really helps, because there are several designs for this kind of thing that not only tell you how to assemble one more easily, but to make it look good as well. If you prefer to do your own thing, not copy others and the like, I understand, but at least look at the plans anyway to get some ideas and then implement. And for future, if its not done yet, label it as such, and don't post the first picture of the rushed whatever the **** that was. Now, from your other posts you seem to have a good idea/drive to build your own airsoft items, its cool, I get it, but first identify something that needs building, or would be really fun to build, and save up to be able to buy quality materials for a quality result, rather then whatever you have lying around the house. Planning should be a major step before trial and error building. The part where you have an idea and then build a prototype to see if it will even work? Save it for the conclusion of the review of the finished product. Keep on implementing.