These Expansion Chambers are unique in the way CO2 is distributed. It enters the bottom chamber and travels through a series of diamond-shaped cones where the liquid and air are mixed evenly, giving a more consistent flow of pressure to the valving of the marker. Unique to its design, the housing works in any position, even if inverted for remote set-up or crawling situations. If excess liquid is pulled through the system due to rapid firing rates, the diamond-shaped cones act as a centrifuge, slinging excess liquid outward to be recycled through the system.
The ACI Sub-Zero 6 Stage Expansion Chamber is older, so while it may be available used and in a few cases new, it is not commonly available anymore.
PMI Piranha power feed with ACI 6 stage expansion chamber, 9 oz c02 bottle
Precision, economical, ease of installation, PRICE, boosts accuracy and consistency
Slightly heavy, DONT let that keep you away though, read on....
Precision - The machining on this part is excellent, the cones on mine were very nicelely lathed and de'burred, nice running fit inside the chamber housing
Economical - WILL save you air/co2 in the long run, and it will pay for itself after a few fill ups. Uses less co2 per shot and allows the co2 to expand quicker, no bottomline should be without it
PRICE - $25
Ease of installation - Didnt take me that long to get all the fittings installed and line everything up. Just remember to have the threaded port on the body pointed where you want it,(use the allen screw on the bottom to loosen, turn as desired, tighten when done) whether youre using a 90° elbow or just threading the hose directly to the port. I had to use an elbow because my 7 inch hose was too long, if youre using a piranha get a 6 Use telfon thread seal tape, about 3 wraps per thread - i havent had ANY leaks at all doing that.
Boosts accuracy and consistency from shot to shot, period.
Now for the weight - it is slightly heavy and sort of large, but its a great grip, better than being too small, once i had it fitted to my piranha it wasnt that much heavier
*NOTE* If you are going to buy this, use an on'off valve on your co2 tank, it will let you turn off the co2 and always dry shoot the marker to use up the rest of the co2 in the chamber (which isnt much)
Great upgrade to any co2 powered gun, period. Just use an on'off valve and youll be golden.
10 out of 10
Last edited on Wednesday, July 7th, 2004 at 11:35 pm PST
Xtra, superfly bolt, aci sub-zero expansion chamber, 14 inch all american barrel, 20 oz co2
confertable, saves a lot of gas, looks great on just about any gun
not much.....it dosnt come in tie-dye.
this is a great expansion chamber. it was cheap, it improves your gun so much. you can actually feel the difference in gas consumption. really. overall....it comes in great colors, its cheap, there is nothing better for your gas hog of a gun. with a good gas consuming gun it is like you dont even have to use co2. i used the same 20 oz for three strait days. four or five games a day. (woods play, 2 on 2.......very quick games) and you dont have to get a whole new kit to install it on my spyder. no extra kits loike on tippys. but thats the gun not the chamber. : ) great chamber.
i would recommend this chamber to any player at any level of play. awesome expansion chamber. it was cheap.....only 25 bucks plus shipping charge. buy it. you wont be dissapointed at the unreal performance of this chamber. i just thank aci for making it. buy, buy, buy!!!
Tippmann 98 Custom
- Flatline Barrel System
- Flatline Barrel Extension
- A.C.I. Sub-Zero 6 Stage Expansion Chamber
- Harris Bi-Pod
- Double Trigger
- Dark Horizon Model 98 Lite Titanium Hammer
- A.C.I. Deluxe Pro Remote Kit
- Ricochet G2K Loader
- Custom Trigger Job
- 20 oz. Anti-Siphoned Chrome Molly Co2 Tank
Does what expansion chambers were meant to do.
None that I can think of.
The A.C.I. Sub-Zero 6 Stage Expansion Chamber is one of the best aftermarket products out there. It gives you roughly 50-100 extra shots per fill and will practically eliminate the frost that comes from your barrel on those icy cold winter days. I think all I really have to say is that if you want an x chamber that will do its job and look sweet while doing it, go for the A.C.I.
If you want a fantastic upgrade to your gun, get this x chamber.
10 out of 10
Last edited on Friday, April 9th, 2004 at 4:18 pm PST
various stock expansion chambers and a few other aftermarket
Inferno T3-ACI 6 stage xchamber, barrel(s) etc. are same as listed below <-backup/alternate gun
Spyder Rodeo at the moment its at stock, it will have a 16" armson stealth, bob long torpedo, empire reloader and 32* trigger frame when I am finished, I have most of the parts (but the trigger) just havent gotten to put it all together yet.
.. isnt free, a little heavy-but very solid.
probably the best expansion chamber on the market, only step up after this is a decent reg. Installs easily in any standard vertical adaptor. Does what its supposed to, i haven't tried to dump my tank into it yet but Ill get there.
also seemed to quiet the inferno down a bit, not sure quite why, but its noticeably quieter.
it is rather large, about 1.5" wide and 6-7" long.
best expansion chamber on the market, if you aren't in the market for a reg and want a good expansion chamber this or the 4 stage is the way to go, hands down.
10 out of 10
Last edited on Monday, July 19th, 2004 at 2:36 pm PST
(the aci 6-S was used on my shutter)
A Great fore grip
save a lot of co2
a little expensive
ok i had this on my spyder shutter so i could regulate my psi and use the sub zero hands down this is the best ex. chamber it greatly increses the consisity in your shots saves you a grip of co2 i had never with this ex. cahmber froze up my gun even at pulling my fastest 9-11 a sec. froze up. i will say the down side to it is it adds a lot of weight to your marker makeing your aim twitch every now add then
even though it cost like 60$ its worth it just make sure you get one of those spyder bottem line regs.
tippmann x chamber, couple regs (stock 2k2 ac reg and the stabilizer - if you consider reg a similar product)
#1 tippmann 98 custom with rt, double trigger, dye ss 12 in, 12 v revy, act 6 stage x chamber (runnin co2)
#2 stock 2k2 autococker with freak system, palmer stabilizer, pmi perfect drop, 12 volt revy (runnin co2)
- very good at keeping out the liquid co2
- cheap, like 40 shipped
- works wonders with my tippmann w/rt
i did a string of my entire hopper within 30 sec (tippman with rt), all the shots were consistant, all going literaly to the same place as the last, no drop off or nothing - my gun would drop off and freeze with the old x chamber, this is much better
- its huge, 6 inches long 2 in wide (dont get any ideas)
- aint perfect, can let liquid co2 through, but u gotta almost make your co2 tank siphoned (aka turn your tank upside down and fire, or put on a siphon hose - oposite of anti-siphon)
great product, if you run on co2 and want something good, and want to save money, get this.....its cheap and works very well
Smart Parts ION
16" J&J Ceramic Barrel
Smart Parts 360 QEV
UFD Fusion Bolt
UFD Black Aluminum X Body
UFD Saw Blade Trigger
UFD Mini T-Lock
D.O.P. Drop Forward w/ On/Off Valve
68ci/4500psi Pure Energy HPA Tank
Increases accuracy by evening out shot to shot velocity
Big-comfy fore grip
None so far
I have never had a real problem with side to side accuracy, but my stock setup just wasn't cutting it as far as where the paint dropped. Velocity inconsistencies resulted in some paint not flying quite as far as others and vice versa. I installed this expansion chamber and wow, what a difference! Not only was the paint having more of a constant trajectory, but the gun seemed quieter. I also really like how this chamber is larger in diameter than the stock chamber. It makes for a nice grip, while really not affecting the ballance of the gun much. One thing to be sure of is that if you are a Spyder owner like me, you WILL need a new bottomline hose. The threads on a stock Spyder hose are METRIC while the A.C.I.threads are STANDARD. I did not know this at first and tried to screw the hose in, only to have it bind after about 1/2 turn. To make this chamber work you will need either metric to standard adapter if you try to use the stock hose, or I bought a new hose all together. Turns out that the stock drop forward on my gun has STANDARD thread and the hose has METRIC at the exp. chamber end and STANDARD at the drop forward end. Seems kinda dumb. Also if you try to use the stock hose you will find that it's too long and you will need to either put a loop in the hose (I didn't really like that idea) to shorten the hose, or buy a new shorter hose with STANDARD threads at both ends. Throw on a little Teflon tape and you're good to go!
This expansion chamber is a big improvement over stock. Just be sure that you know what else you'll need to get it to work. Product performance is a hands down 10, but for the hoops that I had to jump through to get it installed I would say an 8. Don't let that stop you though, after all, you are trying to upgrade your marker, right?
10 out of 10
Last edited on Saturday, November 4th, 2006 at 12:19 pm PST
14in.J&J ceramic barrel
Inline expansion chamber
viewloader quantum (i'm lookin for a new 1)
Jt Slammer pack
Pure Energy 20oz tank
Turns liquid co2 into gas very well, comfortable as a front grip
This is a good x-chamber, it doesn't get frezing cold to the touch, it is comfortable as a front hand grip. I used my Spyder SE without in on and then with it on and got 50-100
shots more. The only thing bad about this is that its kinda heavy and doesn't balance out the gun very well.
It's kinda heavy but other then that its a no brainer buy it!
9 out of 10
Last edited on Monday, May 2nd, 2005 at 6:58 am PST
Just a stock gas thru mini look a like expansion chamber.
Spyder Shutter (blue anodized)
ACI Sub Zero Expansion Chamber (6 stage)
14" Smart Parts Tear Drop barrel
Shocktech delrin bolt
32 Degree spring kit
Smart Parts clear gel grip
Viewloader x board 12 volt hopper
2-12 oz, 16 oz CO2 tanks
Anodized blue (I love it)
The ACI Sub Zero Expansion Chamber 6 stage helps convert the liquid CO2 into gas before it reaches the internals. It helps conserve CO2 a lot. I used to use a 16 oz tank and get about 900 shots but now I can get there with my 12 oz tank. The weight it heavier than stock but looks good on a anodized gun like my Shutter
Always a aftermarket expansion chamber to better your gun.
10 out of 10
Last edited on Tuesday, April 13th, 2004 at 8:41 am PST
32 Degrees 6 stage pretty good, but this kicks ass
spyder shutter, esprint trigger frame, aci subzero 6 stage, and 16" tear drop barrel and a nitro setup
I used it at 10-degrees and my gun didnt even come close to freezing!
I used the ACI at 10 degrees and my gun didnt even comme clos to freezing, no snow whats so ever coming of my gun and you hand dont freeze like you would think over all you get alot more shots per tank, my 20oz i got around 1500 shots, and for so cheap
BUY IT! its sweet, it over all is cheap and high quality! and works well!
10 out of 10
Last edited on Monday, July 5th, 2004 at 5:16 pm PST