you can find them in the numrich catalog or there web site e-GunParts.com
A Sears Moels 300 is a Winchester Model 1400. For a manual, go here: http://www.stevespages.com/page7b.htm For disassembly instructions, get a copy of Gun Digest Assembly/Disassembly for shotguns. Aslo, gunpartscorp.com has an on-line exploded diagram for the model 1400.
www.e-gunparts.com
I need butt end of a duble barrowl shotgun 1017 sears.
I don't have access to specific schematics or diagrams for products like the Sears lawnmower model 131.81182. However, you can often find schematics in the user manual, on the manufacturer's website, or by contacting Sears customer service directly. Additionally, online forums and repair websites may have resources shared by other users.
Your 12 g pump shotgun was made for Sears by the High Standard Company- it was their Flite King model shotgun.
http://www.histandard.info/PDF/Sears%20Shotguns.pdf
Try gunpartscorp website. They have a cross reference to find the make and model of your Sears shotgun.
That should be a Savage/Springfield Model 18. If you can't find parts from a local gunsmith, try http://www.e-gunparts.com i have a sears roebuck bolt action .410 shotgun model 110.1120 3''. i need the shell ejector piece. to get a clip for a shotgun try marlinguns.com.
The sears model 200 is a Winchester 1200. That will make it easier to find info. I have one of these, with adjustable choke and vent rib. It is a sweet shooting and smooth little shotgun.
Sears model 200 is Winchester 1200 try your local gunshop.
I have one for sale. Message me @ garym6@cox.net
Try Numrichgunparts.com