Numrich gun parts corp.They may be found on the web.
The Model 336 was not manufactured by Winchester... instead, it is a Marlin made lever-action. Contact Marlin through their website for parts & service. Bert H.
It is indeed a Winchester 131. You need to check with a gunsmith for parts. gunpartcorp has only the right hand extractor available on their website- sold out of lefthand- but a smith will have other sources.
It is the same as a Winchester model 141 and parts are available from Numrich gun parts
Your rifle was manufactured by Winchester as their model 121. The spent shell is removed from the chamber by action of the right and left extractors and is then bounced out by bumping agains the ejector. Look for problems there. Parts are available from gunpartscorp.com.
Your Sears Model 2C rifle was made by Winchester as their Model 131. SOME parts are available from Numrich Gun Parts Corp. See link below that will take you to the Numrich catalog for the Winchester 131.
The Winchester model 25 was the non take down version of the Model 12 pump action shotgun.These shotguns were made from 1949-1954.There were only 87,937 shotguns made during this time span.They were chambered in 12 gauge only and were available with either a 26in,or 28in barrel.While this was made as a model 12 non taken down model,one must presume that the ability to interchange parts between the model 12 and model 25 is possible.I would look to Numrich Gun Parts Corp.as a possible source for these parts.
Numrich gun parts corp.(E-gun parts.com).
The Sears 2C was made by Winchester and is basically the same as the Winchester Model 131. Owners manuals might be found online at one of the auction site like eBay or GunBroker. We have parts available. sales@countrygunsmith.net
check with: dixiearms.com
mid westgunworks.com has what you may need. The model 120 is the same internally as a model 1300, you can download a factory manual from the Winchester website for a 1300 if you need one.
The Model 1917 U.S. Rifle made by Winchester is worth about $800 to $1000 in excellent condition with all original parts. Much less if it has parts from Remington or Eddystone and has gone through an aresenal refurbish.