Its depends on the brand. Many different companies make a M14.
go for the m14, unless its cheap looking.
Fps- 400 cost- $355usd
Yes, an M14 Airsoft Sniper is good. My cousin has almost all of the airsoft guns their are and he loves the M14. I would recommend it.
No.
You can not, there are no conversion kits from an m14 model to an M1
280 fps
44.5 inches
The typical airsoft m14 weighs around 5lbs but the socom m14's are slightly lighter and the m14 ebr's weigh in at close to 15 lbs.
Airsoft Megastore 7.00$ -Jeff
It is possible. It is best to have a professional do it. AirsoftGI has a great upgrade service. FPS ces from the spring in your rifle, the hard it is to compress the spring, the harder it shoots. AirsoftGI can install a harder spring for you. Airsoft Tech is confusing, and is best to leave it to those who know what they are doing. (Unless you do hours of research and practice on cheap gins/gearboxes)
No
Quality airsoft guns are fully automatic. Most any airsoft gun on AirsoftGi.com is full unless is specifies "semi only"