It's too broad of a question to answer here, but semi auto pistols can weigh from about 9 ounces up to several pounds depending on which model you mean.
Yes, to some extent.
Probably not. However some pistols can be fitted with an aftermarketlaser sight.
The .45 ACP--which stands for AUTOMATIC COLT PISTOL is used in semiautomatic pistols. The .45 Colt is used in revolvers.
If you meant "pistols", the M1911A Colt semiautomatic pistol chambered for .45ACP was the Army's standard sidearm from World War I through the Vietnam era.
The Company often issues guns to its agents. Most of the guns issued are highly customized Strayer Voigt Infinity 1911 .45 caliber semiautomatic pistols.
Barrett makes a range of .50 rifles, some of which are self loading (semiautomatic), and some of which are bolt action. The most famous of these rifles is the M92/M107, which is semiautomatic.
No
Semiautomatic means that you don't need to operate the clutch but you do need to select the gear range manually.
well?
The actions operation.
Semiautomatic = when you pull the trigger, it fires one round and automatically reloads the next but does not fire again until the trigger is pressed again.
A single shot pistol, a Derringer and even a revolver are technically NOT considered semiautomatic. To be semiautomatic, the weapon would need to use the energy from a previous round to cycle the action. Revolvers use the muscle energy of the shooter's finger to revolved the chamber.