its an automatic car with a manual option (excluding the clutch part) in which you select when the gears change just by either moving the shift knob a special direction. or F1 inspired shift paddles. you dont even need to take your foot off the gas.
Auto Transmission Fluid
The semi-auto and full auto AK-47s have different designs. Not only does the full auto have different parts, but those parts cannot fit in the semi-auto only version of the AK-47. It is against US law to have a semi-auto that can be "readily converted" to full auto.
The M14 was never factory made as a semi-auto.
Bubbles mean that you have overfilled it with transmission fluid. It churn up the fluid and becomes frothy.
The SKB M-7900 is a pump shotgun not a semi-auto.
The 1999 Hyundai Accent GL recommended transmission oil is API GL 5, SAE 75W90 semi synthetic transmission fluid. The transmission fluid can be purchased at any auto parts store.
Your question is sort of like "How much does a car cost?" Depends on the car, and depends on the rifle. If you mean a civilian version (semi auto) of an AK47, about $400. If you mean a legal, select fire (semi or full auto) M16, about $16,000 plus fees.
There are currently no semi auto firearms on the market which chamber the .45 Long Colt.
The first production semi auto pistol was the Mauser c/96 "broomhandle" pistol.
Semi-auto requires the hammer to be cocked for the first shot.
If you can find a custom maker, maybe, otherwise, no
Can I replace my auto transmission with a maual transmission in my 94 trooper