Air Arms Owners Club

Yes it can there is a pin that is moved from one side of the cocking slot in the striker body to the other.
http://www.gunspares.co.uk/products/24238/S400

Part number DP056

Beware, that innocuous looking wee pin can be a pig to remove. Get some heat on it and some needle nose pliers. It goes back in a lot easier than it comes out!