Depends on what you're going to do with it. Keep in mind parts are slim. If you're looking at this for a primary or always carry sidearm, I have to say no. I've had lots of consistency issues with my pt jr when it doesn't leak. I'm not sure about the valve on the extreme, but I'm having to manufacture one for my jr just to get it out. Nice project though...easy to pull apart otherwise
A man walks in to a bar and hands the innkeeper three nails and asks "Can you put me up for the night?"