MARKER: Spider Compact 2000
AIR SOURCE: 20 OZ. CO2 tank and 12 gram CO2 cartridges.
REGULATOR: WGP Stock Regulator, seems to work well. To put a gauge I had to add an ASA Spacer.
ASA ADAPTER: Stock, but drilled out to allow greater air flow, very tricky.
VALVE: 32 Degrees Stainless valve and Valve Pin Combo - It's a high flow valve for a low pressure setup.
VALVE SPRING: I've found that the best one is the stock spring for some reason, less problems.
BOLT: AKALMP Lightning Bolt - Good for low pressure, but you can use your stock bolt. Just take the center "star" out with a pair of needle nose pliers and that will allow more air through. The only short coming is that it's not as gentle on the ball, and it's slightly more constricting, but not by much.
BARREL: Lapco Bigshot - Good for low pressure, but a bit on the loud side. That can be a good thing up close, but it seems to telegraph the shots when firing from a distance.
HOPPER: 9 Volt VL Revolution converted to a 12Volt. Works fine for most paint except PMI with the Advantage Shell, They don't feed properly sometimes to the point where you have to bang on the hopper. And, as of this writing there are no VL Revolution paddles that work with them. So, I modified mine by taking a third-party paddle, cutting off the hands, drilling them out and placing weed whacker line in their place. All you need is a really thick weed whacker or electric lawn mower line, a drill, a saw and super glue.
FEED ADAPTER: Polecat Straight Feed - Allows you to shoot over the top of the barrel, worth the $40.00 I paid.
GRIPS: Dye Sticky Grips - cheap and comfortable, makes the plastic grips seem less frail and all you have to do is file down the nubbin to make them fit.
MISC: Quick-strip screws - lets you take your gun apart faster.
STOCK: Lapco Stock with Drop Forward - See below.
It looks nice and works for 12 gram CO2 by providing something to hold the gun steady. It also works with a 20 ounce tank, but placement wasn't as sure because of the weight and lack of traction on the stock butt plate. You could remedy that by wrapping some fabric on the end.
It did not work with my PMI (1999) 68ci/3000psi HP Tank, not enough room. I've read on other reviews that it fit, but mine didn't, maybe it's because mine is older, don't know.
The best use is for 12gram CO2. It adds heft and stability for long shots. Next best is a 20oz or smaller Co2 tank, just put some camo tape on the butt to provide a non-sliding surface. If you plan on using a High Pressure Air tank you're better off using the tank as a stock. Just put some "Loc Socs" on it to keep it from sliding off your shoulder. I found the HP tank to be more comfortable than a stock, but that's a personal preference. If you are not going for the Rifle Look, consider getting a CP Flame Drop Forward, they're awesome.