Airsoft guns are replica firearms that propel plastic pellets by way of compressed gas or a spring-driven piston.
readily apparent to the mind; "a clear and present danger"; "a clear explanation"; "a clear case of murder"; "a clear indication that she was angry"; "gave us a clear idea of human nature"
the state of being free of suspicion; "investigation showed that he was in the clear"
Having or feeling no doubt or confusion
completely; "read the book clear to the end"; "slept clear through the night"; "there were open fields clear to the horizon"
Leaving no doubt; obvious or unambiguous
Easy to perceive, understand, or interpret
The M4 carbine is a family of firearms tracing its lineage back to earlier carbine versions of the M16, all based on the original AR-15 designed by Eugene Stoner and made by ArmaLite. It is a shorter and lighter version of the M16A2 assault rifle, with 80% parts commonality.
An Enigma machine is any of a family of related electro-mechanical rotor machines used for the encryption and decryption of secret messages. The first Enigma was invented by German engineer Arthur Scherbius at the end of World War I.
GNU m4 is the GNU version of the m4 macro preprocessor. It is designed to avoid many kinds of limits found in traditional m4s: limits like maximum line lengths, maximum size of a macro, number of macros, etc. Removing such arbitrary limits is one of the stated goals of the GNU projects.