SEAL (Sea Air and Land) This is an acronym used to describe the secret elite fighting force of the United States Navy.

Semi-Automatic The semi-automatic mode in a gun reloads the breach but requires another trigger pull for the next shot to be fired.

SF (Sustained Fire) A term used to describe the fully automatic firing mode.

Sig (Schweitzerische Industrie Gesellschaft) German for “Swiss Industrial Corporation”, SIG is a real-steel gun manufacturer that makes several different lines of firearms. Many of the SIG firearms have become Airsoft replicas.

Silicon Spray A silicon based lubricant used in the maintenance and cleaning of Airsoft guns.

Single Action This type of gun has a more sensitive trigger firing mechanism, but must usually already be cocked in order to fire.

Skirmish A slang term, which has evolved in the Airsoft community to describe larger mock battles, which take place in large fields or designated areas of play. Also called war gaming, teams compete against each other with speed and tactics similar to actual military battles.

Slide The main moving section of an automatic gun. The slide is the part of the gun that lifts the bullet or BB from the magazine and places it into the breech and fires it. The slide can be the top half of a semi-automatic pistol that is visible, but can also be hidden inside the gun such as in assault rifles and SMGS. When the slide is hidden and inaccessible, a bolt is connected to the slide which protrudes outside the weapons body. This bolt allows the shooter to manually manipulate the slide as desired.