I'm not sure, but I believe the Davis Firearm company is out of business, so there is no one you can contact.
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As was common before it became illegal to sue a gun manufacturer for pure operator negligence, Davis Industries was essentially sued out of existence in 1998.
Currently, the Davis Industries semi-auto and derringer designs are produced by Cobra Industries. Cobra bought the machinery and design rights. The Cobra CA32 is the Davis P-32 and the CA380 is the Davis P-380. The Cobra derringers are the former Davis Industries derringers. All parts interchange.
However, a first step would be to contact a local gunsmith, but to be blunt, the cost of repair may exceed the value of the pistol- these are not high dollar items.
Sears are the contact points that disengage during a trigger pull to allow the hammer of a firearm to drop and fire a round.
No
You can contact Winchester, but as they are made to fire only BLANK ammo, they are not a firearm, and records may not be available. Contact Customer Service thru the Winchester website.
Not in the public domain
Depending on what you are needing to contact Davis Vision for you have several options. The easiest is to contact them online at their own website Davis Vision. All other information to contact them is on there as well
UC Davis Fire Department was created in 1917.
Try e-gunparts.com
It is when you fire the rifle or shotgun, but the projectile fails to leave the barrel of the firearm.
Yes
The Chinese fire stick
No
A semi-automatic firearm will only fire one round per trigger pull, then the trigger must be released and pulled again to fire the next round. A fully automatic firearm will fire as many rounds as it has available as long as the trigger is pulled.