I am a single mom of 2 boys. I know nothing about air soft guns, assembly, how to modify and make better, etc. The spring inside needs to be adjusted or modified but not sure how to do it. My son is very frustrated that he cannot use the gun like he thought or had the understanding of when reading the description before purchasing. Overall, I'm disappointed with how the gun is designed. Maybe if I knew more about them my review could possibly be different but unlikely. I will be looking to purchase a better designed/assembled gun. I feel like I wasted my money on this one :(