These include the C02 1740, 2240, 1750, 2250B, 2250XE, 2760, 2260, 2300T, 2300S, 2300KT, and 2400. On the pneumatic pumpers we have the 1377, PC77, 1322, and Backpacker.
First, these guns share many components across the two power plant platforms. A moderator on one of the better forums put it that Crosmans are the "Lego's of air guns". I will add that only the Barbie doll has more opportunity for dress up combinations... but just barely.
The guns are well made and are surprisingly accurate right out of the box. The cost to buy new is ridiculously low in my opinion. But that is a good thing, because the designs lend themselves to nearly infinite combinations of modifications for looks / style, performance, accuracy, and accessorizing.
Some folks may wonder why anyone in their right mind would buy a 2240 for less than $60, and then change and add things to their liking until they end up with 2, 3, 4 or 5 times the initial cost of that new gun. The best way to get the point across is to hand someone a stock 2240 or 1377, etc. to look at, feel and shoot. Not bad at all. But then hand them a custom build to look at, feel and shoot. Most would instantly "get it".
The next blog page will be a how-to that will be an easy, free do-it-yourself mod with no chance of failure and guaranteed improvement.
Until then... Have Fun Shooting!