I learned this skill at the age of six. I used to pick the padlock on the neighbor's crawl space and "borrow" coke bottles to take to the Majik Market on the corner and turn in so I had some coin to buy some candy. Been developing it ever since.
Like how they list the price with and without the laser and no basic sights on either. Secondly, I would like to see Mr. Happy take a head shot at 25 yds with the way he was bouncing that laser all over the plate at 5 yds!
Go with your gut instinct on this. Since you are dealing with a modular system, start out with the basic "get it running" parts and then upgrade as needed!