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...
The Borchardt, in 1893, was the first commercially successful auto pistol.
100-300 dollars
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?