www.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.
Get a copy of the Gun Digest Asembly/Disassembly instructions for centerfire rifles. The Marlin Mod 36 is included.
Check the diagram on Numrich website or in their book. egunparts.com The original manufacturer for your gun is High Standard model K2011.
Contact Marlin.
www.savageparts.com has a schematic. I advise against disassembly unless you absolutely have to. sales@countrygunsmith.net
Call Beretta customer service.
Rifle, handgun or shotgun?
I cannot find any instructions, however, the 59 breaks down like the 1911.
I would contact Remington directly.Their Customer service dept.should be able to help you.
savage model 25 pump action 22 long rifle
Post this question on rimfirecentral.com and I may be able to help you.
The 469 is very similar to the 59, 459, and 669. Gun Digest publishes an excellent series on Firearms Assembly and Disassembly and the Part 1 Automaic Pistols volume includes excellent instructions on disassembly of the model 59 series.