I believe it will be the Desert Eagle 50 AE.
Impossible to answer without more information.
.357 mag in revolver .45 auto in semi auto
Bolt and semi-auto
In most cases the answer would be no, but there are some revolvers with addition of halfmoon clips can safely fire the correct semi auto ammo...
100-300 dollars
The Borchardt, in 1893, was the first commercially successful auto pistol.
Browning makes a very nice one.
A detailed description is needed. Is it a hand gun or a long gun? Revolver or Semi-auto? Bolt, pump, single shot or semi-auto rifle/shotgun? Serial number?
S&W never made a Model 69 semi-auto pistol
$800-$1200, depending on which version and condition.
most semi auto AEPs use a 7.2v 500 mAH battery. try airsplat.com, they have a really good selection as far batteries.
Impossible to answer as asked. Factory or custom?