other products by Crosman
Things I liked: It's a seal for the co2 cylinder. It's pretty straight forward there. If your 12 gram powerlet leaks profusely around the cylinder after puncturing, this is probably what you need. If the teflon tape trick works in your gun, this is definitely what you need. It comes in a small ziplock bag, so packaging is a plus as no tools are needed to open it.
Things I would have changed: Can't think of anything, really. You may need to research the specific gun you are trying to repair in order to see how to take it apart. That's more of an observation of knowing what you are getting into than an issue with the seal itself.
What others should know: I ordered two of these seals and repaired two airguns. One is a vintage Crosman Powermatic 1600. The seal fit perfectly with no issues. Nice to have this one shooting again. The other is a Bear River Black Ops Exterminator revolver http://www.pyramydair.com/s/m/Black_Ops_Exterminator_CO2_BB_Revolver/3517 Basically a wingun revolver clone along the same lines as the Dan Wesson revolver line. For the exterminator I had to trim down the gasket to fit the smaller diameter gasket housing. Once done, the exterminator was working like new. I recommend applying pelgun oil to the gasket upon installation. Soak the gasket once it's in place before reassembling the gun. If you are trying to replace the seal on a Crosman gun, the Crosman website has complete teardowns for just about all of the guns they have ever made readily available for download.
Things I liked: Worked perfectly
Things I would have changed: Nothing
Things I liked: fixed my problem
Things I would have changed: nothing
how to change seal???
probably want to look at the instructions or call Crosman if you are not sure.
will this seal fit my older crossman357 4 in. barrel it starting to leak air
it does not fit; there is no where to put it; no help to change it; no answers;
It will fit all crosman 357 air pistols regardless of barrel length.
will this work for my crossman tr77 spring break barrel
No, this is a co2 caplet seal, you need a "breach seal" for your spring piston break barrel tr77.