Originally Posted by Mondo131

Many people that are listing parts are not puting them in the order of how they will be used.

Very first thing you should do is buy a feedneck. No one likes to sit there with a bottle of lube trying to get your halo to fit into the feedneck.

After that, a On/Off. The stock ASA will work for awhile but the longer you use it, the greater chance of you warping your tank threads.

Either a trigger or a qev should be next.
-Purchase a trigger next if the stock one isnt "comfortable" for you, or you cant get it adjusted to your likeing.
-Purchase the QEV if your playing mostly in your back yard or have a small air tank. QEV's Dramaticly increase air efficiency. I shot about 4 hoppers(Halo) using a 68/45 Throttle and only used about 1000 PSI.

After the trigger,qev,feedneck,asa, Your gun will start to become unique.

If you dont have a Halo, or an egg by now, purchase one.

Now lets work on the internals a bit more.

Purchase new firing can/rear donut. These increase your air efficiency even more and can give a good 1-4 pod increase.

Next purchase either a regulator or a new barrel/barrel kit(depending on your style of play).
-Although the stock reg's are "ok" the best i've seen mine do was +/-10 FPS.

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The next purchases can be made either when the old ones go bad, or if you got a little extra cash laying around.

Detents(Mine are still fine.)
Grips
Body(Purely cosmetic unless you purchase one that has a Bolt Out Back design)
Grip Frame(Cosmetic and can reduce fatigue)
Board(Many brands available, Purchase only if your a tournament player)

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One last thing to cover. Bolt.

There are many bolts out now for the Ion. The bolts can increase air efficiency, reduce kick, reduce operating pressure(thus increasing air efficiency), can be more gentle on paint, and in some cases gives your gun a whole new sound.

I'd say purchase a bolt about the same time as the firing can/donut.



Hopes this helps.