A shoulder stock permits a more steady aim, and generally improves accuracy.
Sometimes it will.
You need to be more specific as to what gun and what "accurate" is. However In general electric markers are more consistent that mechanical ones, which would make them more accurate.
The bolt, buttstock, buffer.
To make the bullets more accurate by causing them to spin.
it depends on the gun, if its a shotgun then im not sure because ive never fired a rifled shotgun barrel. but with slugs in the shotgun yes it will make it much more accurate. and any traditional gun will be much more accurate with a rifled barrel. thats why muskets sucked lol
Have it checked by a good gunsmith
It depends on the model. But Yes in some cases.
you load the gun in the buttstock
no it does not the only way to make guns more is to put a grip on it and not having a supresser
yes it does
It means that the buttstock of a long gun can be adjusted to fit different shooters.
The sp1, because it has a regulator.