very good first attempt. You did a great job on the mechanism. Just wanna point you at the fact that this is not a semi-auto gun. semi-auto means one pull at the trigger is one shot. You have to pull the bolt back, so it's more a bolt action gun. anyway let's stop whining about semi and bolt actionand just tell you that you should keep on building like this!

Thanks for pointing out my mistake, pretty obvious wasn't it :P...fixed now...was in a hurry at the time ;).