Hi I'd just like to say first I'm fairly new to airsoft so don't know much about how the guns work. So my problem is I recently bought my first bolt action sniper rifle (this one http://www.patrolbase.co.uk/airsoft/cm-701c-vsr-bar-10-faux-wood.htm#.VOphm-geJpU) and for some reason I can pull the bolt back fine the spring locks in place but I can't pull trigger, the safety is off. Just like to say if I take the wooden stock off I can fire it just fine its only with the wood stock on the problem happens.any help is greatly appreciated