I have had several CO2 and pump type pellet pistols. Almost every one of them had the seal leak where the CO2 cartridge is punctured by the pin inside the gun.
I had two or three daisy multi shot semi automatic air pistols and every one of them leaked so bad that they would not hold air.
To be fair to Daisy I didn't know to oil the seals every so often to keep them soft and pliable. So they may have just dried out.
I've also had several of the Crossman Semi Automatic CO2 pistols that either had the pin break so they would no longer break the seal on the CO2 cylinder or they leaked all the CO2 out in a matter of seconds after they pin punctured the CO2 cartridge.
If you want accuracy you are going to have to pay big bucks to get a good Air Rifle as the pistols have pretty short barrels and are not nearly that accurate.
I've had the following CO2 Pistols:
1) Daisy Power Line Model 2003 Semi Automatic 35 Shot Pellet Pistol
2) Daisy Power Line Model 2001 CO2 Powered 35 Shot Repeater Rifle. This one still works and it's pretty accurte at 30 yards
3)Crossman Model 1377 American Classic Air Pistol. This one still works. It's a pump type air pistol and it's a single shot.
4) Walther CPSport High Performance Semi-Automatic CO2 Pellet Pistol. I really like this one. The CO2 cartridge connection is very solid and has not leaked in over two years now. But it's not that accurate. It's ok for a pistol but you have to remember that the barrel is short and may not be rifled to increase accuracy. And lead Pellets are affected by the air a lot. I carry this one with me a lot. I looks like a real pistol and it can do some damage if you were to shoot some one. You have to use short skirt type pistols as the clip is a round rotary type that long skirted pellets may damage.
5)Crossman Model 1088 Semi-Automatic CO2 Air Pistol. This one broke or the seal leaks badly. Looks good on paper as it's a semi automatic type but it's no good if you can't keep the CO2 in it.
6) Crossman Model 357 (six) CO2 Air Pistol which used a six shot rotary clip. The hammer broke off on this one and something else broke making it useless. I think that they still sell these at Walmart as I've seen them for sale at some of the local Walmart stores. Also the locking mechanism that holds the barrel in position broke on this pistol. Making it useless. And it leaks CO2 or the pin broke off. The pin that's used to puncture the end of the CO2 cartridges.
7) Crossman RepeatAir 1077 CO2 Rifle. I have two of these and both will not hold CO2. They both leak out CO2 within a few seconds after puncturing the CO2 cartridge. They would be very nice guns if the seals worked. I ever had the adaptor to allow one to use the large CO2 cylinders and that leaks too. They are pretty accurate when they worked and are multi shot semi automatic with a rotating clip that inserts into a removable magazine. I like the design of this gun as for as they way it loads and fires as fast as you can pull the trigger. But it won't work without CO2 pressure.
8) Gamo Bone Collector. Single Shot break action with a spring inside. NO CO2 to leak out. Just a hard spring that's compressed. it's pretty accurate once you get the scope mounted tightly on it. But I don't like the way that the scope mounts to the groves on the top of the barrel. I use a Gamo 4X scope that came with the gun. I had problems with this scope moving a lot over time. Now that I tightened the scopes screws with a bigger wrench I hope that the scope stays on tight. One guy who reviewed this rifle on the Airguns, airgun sale, air rifles, bb guns, air pistols, lasers | GAMO USA web site said that he had to use Loctite to keep the scope in place.
I did see some nice pistols on the Gamo Site but I don't know anything about them other than what I read. Gamo is a Spanish Company so beware of that.
I've called Crossman and tried to talk to them about some of the problems I've had with my Crossman Pellet Guns nad the lady I talked to was a Bitch and would not give me any help in replacing my broken guns. And I took my 1077 rifles to Rajo's Gun Shop on the West Side of Evansville, IN and was told by the owner that it would cost more to repair them than they were worth. I've got that in writing.
Bottom Line is only two of my CO2 guns work still. The CPSport and the Gamo. And the only other one that still working is the Crossman pump up pistol. Every other CO2 Air Pistol was a waste of money. And the pistols cost about $50 for the Crossmans. The CPSport was about 99 dollars. I guess you get what you pay for.
I'd like to check out the newer Enert Gas Technology type air guns from Gamo. But they are around $300 to $200. Not exactly cheap for an air gun.
NOTE: none of these air pistols are that accurate except at very short range.



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