Most Accurate Airsoft Sniper

accurate
(of an instrument or method) Capable of giving such information
(of a piece of work) Meticulously careful and free from errors
conforming exactly or almost exactly to fact or to a standard or performing with total accuracy; "an accurate reproduction"; "the accounting was accurate"; "accurate measurements"; "an accurate scale"
(of information, measurements, statistics, etc.) Correct in all details; exact
(accurately) with few mistakes; "he works very accurately"
(of ideas, images, representations, expressions) characterized by perfect conformity to fact or truth ; strictly correct; "a precise image"; "a precise measurement"

airsoft
Airsoft refers to a class of replica air powered guns that originated from Japan (although the origins go back to the US in the 70s). The power levels are way below those of traditional airguns, but the guns are 1:1 scale copies of original pistols, rather than original designs.
Airsoft is primarily a recreational activity with replica firearms that shoot plastic BBs that are often used for personal collection, gaming (similar to paintball), or professional training purposes (military simulations, a.k.a. MilSim, and police training exercises).
Generalised connotation for the sport of Airsoft.

sniper
a marksman who shoots at people from a concealed place
Sniper is a 1993 action film starring Tom Berenger and Billy Zane as American snipers on an assassination mission in Panama.
A sniper is a highly trained marksman who shoots targets from concealed positions or distances exceeding the capabilities of regular personnel. Snipers typically have specialized training and distinct high-precision rifles.