Sometimes it on the top of the barrel near the rear sight. Sometimes it's on the side of the barrel.
Crosman has parts for this rifle. You will find their 800 number at the bottom of the attached document. The Storm XT is model C1K773932. See the link below. BTW it's an Air Rifle not an Air Gun.
Go to ( See the link below ) and find your parts and owners manual for your gun or rifle. Crosman keeps a web page for older airguns.
As far as I know there is no Crosman model 88. Daisy made a model 88. I've attached a Link to Crosman's list of Owners manuals for all their rifles. You are welcome to look at it and try to find a Crosman model 88. See the link below.
Sears Model 126.19300 is a Crosman model 140/1400. Crosman no longer repairs this model. Go to http://www.crosman.com/airguns/service/repair and put in your model number and it will help you find a repair shop near you.
I have absolutely no information on a Crosman model 143. Are you sure it isn't a model 140 or model 147. I even searched the net and can not find anything on a model 143.
Yes! Crosman made all the BB Guns/Rifles for Western Auto under the Revelation brand name. (Unfortunately you did not state the model number so I can't tell you exactly which Crosman model it relates to.) So here is a suggestion. Crosman has Most all their manuals online you will have to go through all of them to find your model. See the link below.
Crosman offers a service to locate shops that repair older Crosman air guns and rifles. See the link below.
I'm going to try and help you with an answer. I know for a fact that the 126.2830 was made by Crosman for Sears. All Sears model starting with 126.XXXX were Crosman models. My catalogue list the model 126.2831 as a model 180 Crosman rifle not a gun, and I think yours is a variation of that model. See the #1 link below to see if it is a match. If your is a Crosman model 180 rifle, then See the link #2 below. Crosman offers a service to locate repair shops that repair older Crosman models. Link #3 is a parts list for the model 180
Crosman no longer has parts for this rifle. But there are independent companies that repair older air guns. Crosman offers a free service to locate these shops. See the link below.
Crosman made 4 versions of the model 66 AIR RIFLE it's not a gun.See this link for the manual and parts list http://www.crosman.com/cs/manuals/crosman-rifles
A Crosman model 110 "Town and Country" has not been produced since 1951. You will have to search the web to find one.
I've gone through all of my resourced and could not find a model 6231N Crosman. If this is the model number it doesn't conform to Crosman normal numbering system. I've looked through all the models that Crosman has made and could not find anything. I believe you have a Crosman but I need more information to identify it. The Crosman home page has a link to all of their Air Gun & Rifle Manuals. If you want you can search there. See the link Below and then click on "Download a manual." when it opens.