A

ACU - Army Combat Uniform

AEG - Electric-powered airsoft guns typically use a rechargeable battery to drive an electric motor, which cycles an internal piston/spring assembly in order to launch pellets. Automatic and semi-automatic operation is possible which gives these guns the popular name \"automatic electric guns\" or AEGs. These guns often attain muzzle velocities of 200 to 500 ft/s (60 to 150 m/s) and rates of fire of between 300 and 2000 rounds per minute. They are the most commonly used and widely available type of airsoft gun.

AEP - Automatic Electric Pistols , abbreviated AEPs, was first introduced by Tokyo Marui in 2005 with their Glock 18C (followed later by a Beretta 93R model). They were the first handguns to incorporate an electric powered system that capable of full-automatic operation.

ALICE - All-purpose Lightweight Individual Carrying Equipment

Ammo - Ammunition

AO - Area Of Operation

APC - Armored Personnel Carrier

ASAP - As Soon As Possible

Automatic - An automatic firearm is a firearm that uses the energy of firing to extract and eject the fired cartridge case, and load a new case. The term can be used to refer to semi-automatic firearms, which fire one shot per pull of the trigger, or fully automatic firearms, which will continue to load and fire ammunition as long as the trigger (or other activating device) is pressed or until the ammunition is exhausted. \"Automatic pistol\" or \"automatic shotgun\" generally refers to a semi-automatic design, while \"automatic rifle\" more often means a fully automatic or selective fire design. 

B

BAR - Browning Automatic Rifle

BB Pellets - BB pellets are spherical projectiles used in Airsoft models. Typically made of plastic, they typically range in size from 5.98 to 6.00 mm in diameter, though some long range models use 8 mm pellets. Often called \"BBs\", after the ammunition for BB guns, this is a misnomer; true BBs are named for BB sized shotgun shot, which is 0.177 inches (4.5 mm) in diameter, which is 25% smaller than an airsoft pellet.

BDU - Battle Dress Uniform (BDU) in the United States was the standard military uniform worn into combat, battledress as opposed to \'display\' dress uniforms worn at parades and functions. BDUs may be either plain fatigues or in camouflage colors.

BIL - Bug In Location, essentially the same as a BOL with the implication that you are already at your BIL

BO - Bug Out, Bail Out, Bugging Out

BOB - Bug Out Bag

BOL - Bug Out Location

BOV - Bug Out Vehicle

BP - Battle Position

BTW - By The Way

BUG - Backup Gun 

C

Cal. - Caliber

Camo - Camouflage

CADPAT - Canadian Disruptive Pattern

CB - Citizen Band Radio

CBRN - Chemical Biological Radiological Nuclear

chem  - chemical

CI  - counterintelligence

CinemaSim/ CineSim – Cinema (Movie) Simulation. Generally combines airsoft play with some movie plot role-playing elements. Several goals or missions are assigned to each team based or loosely based on the plot of a specific motion picture.

Classic Guns - Are usually older variety airsoft guns which are gas powered. Unlike the gas pistols of today, they can run on either an internal tank using conventional airsoft gas or use an external CO2 tank much like a paintball gun. They generally cost more than the standard AEG but provide a more realistic approach to airsoft. There is usually some \"recoil\" provided by these guns. While these guns can become more powerful than AEG\'s, almost all users operate them at sub-AEG power. Instead of relying on pure FPS for range and accuracy, they employ a special hop-up called a LRB. The LRB turns the entire barrel into a hop-up system, so the pellet can travel much farther without high muzzle energy. They also have a higher rate of fire because a spring doesn\'t need to be pulled back each time a shot must be fired.

C02 - Compressed Air 

CO - COMMANDING OFFICER

Co. - COMPANY

Coms - Communications

COMSEC -  COMMUNICATIONS SECURITY

CP  - COMMAND POST

CP-OP  - COMMAND POST-OBSERVATION POST

CQB - Close Quarters Battle (CQB) or close quarters combat (CQC) is a type of fighting in which small units engage the enemy with personal weapons at very short range, even to the point of hand-to-hand combat. In the typical CQB scenario, the attackers try a very fast, violent takeover of a vehicle or structure controlled by the defenders, who usually have no easy way to withdraw. Because enemies, hostages/civilians, and fellow operators can be closely intermingled, CQB demands a rapid assault and a precise application of lethal force. The operators need great proficiency with their weapons, but also the ability to make split-second decisions in order to limit friendly casualties.

CQC - Close Quarters Combat, See CQB above.

CSW  – Crew Served Weapon… a heavy machine gun or mortar. 

D

DCU - Desert Camouflage Uniform (DCU) is essentially the same as the United States military\'s Battle Dress Uniform (BDU) uniform, only featuring the three-color desert camouflage pattern of light tan, pale green, and brown, as opposed to the dark green, black, brown, and dark tan of the BDU\'s woodland pattern. The DCU and the BDU are currently being phased out of use with the US Army by the new Army Combat Uniform (ACU).

Demo - Demolition

Deton - Detonation

DIY - Do It Yourself

DOA - DIRECTION OF ATTACK

DPCU - Disruptive Pattern Combat Uniform (also called Auscam, Austcam, Ozcam or DPCU) is a five-colour military camouflage pattern used by the Australian military. It was developed and trialled during the late 1970s and early 1980s. Its name and initials DPC or DPCU should not be confused with \"DPM\" (Disruptive Pattern Material), a British pattern of camouflage.

DPM - Disruptive Pattern Material (DPM) is a camouflage pattern used by British forces as well many other armies worldwide, particularly in former colonies. Direct copies or variations of DPM have been used by Canada, Jordan, The Netherlands, New Zealand, Oman, Pakistan, Portugal, Russia, Saudi Arabia, Indonesia and the United Arab Emirates, to name but a few. The main variant is a four-colour woodland pattern with olive, green, brown and black, there is also a two-colour desert variant in tan and brown. DPM has been criticised for its use of black, as “there’s no black in nature!” but once faded, it becomes dull and subdued.

DS - DIRECT SUPPORT

DZ - DROP ZONE 

E

Ea. - Each

EA - Engagement Area

EBB - Electric Blow Backs, also known as EBBs, are cheap electric guns, mostly modeled after real world pistols, which typically run off of four AA batteries or AAA batteries. EBBs generally have a very low muzzle velocity and \"blow back\" like a Gas Blow Back to simulate the action of a real pistol.

EBR - Enhanced Battle Rifle

E&E - Escape and Evasion

EMP - Electro-Magnetic Pulse

EMS - Emergency Medical Services

EMT - Emergency Medical Technician

EPW - Enemy Prisoner Of War

E-Tool - Entrenching Tool 

F

FA - First Aid

FEMA - Federal Emergency Management Agency

1SG - First Sergeant

FIST - Fire Support Team

Flecktarn - Flecktarn (also known as Flecktarnmuster, Fleckentarn or simply Fleck) is a 3-, 4-, 5- or 6-colour disruptive camouflage pattern. The use of spots creates a \"dithering\" effect, which eliminates hard boundaries between the different colours in much the same way the squares in the newest digital camouflage patterns do. The pattern is designed for use in temperate woodland terrain. It has been adapted as desert camouflage by varying the colours.

FMJ - Full Metal Jacket

FO - Forward Observer

FPS - Feet per second is a unit of speed or velocity. It expresses the distance in feet (ft) traveled or displaced, divided by time in seconds (s, or sec).The equivalent SI unit is the metre per second. Abbreviations include ft/s, ft/sec and fps, although the representation ft s-1 is not often used.

Frag - Fragmentaion

FRS - Family Radio Service

FUBAR - Fouled Up Beyond All Repair 

G

Gas – Airsoft reference to a weapon that uses some form of gas to operate. See: C02, Green Gas, Propane. 

GBB - A gas blowback (GBB) feature is a mechanism which cycles a slide or bolt to better simulate a real firearm\'s operation.

GMRS - General Mobile Radio Service

GMT - Greenwich Mean Time (see also ZULU)

GNBB - (Gas Non-Blow-Back)

GPS - Global Positioning System

Green Gas - Green Gas is the propellant typically used to drive Gas Blow Back Airsoft guns, consisting of the gas propane with silicone oil added. Some brands may advertise their product as Green Gas, or refer to it as \"Ultra Green Gas\", \"Xtreme Green Gas\" or similar, when in fact the propellant is not Green Gas/propane. Products advertised as being more powerful than Green Gas are typically Red Gas, correctly known as HCFC-22. 

H

HBAR - Heavy Barrel (Rifle)

HE - HIGH EXPLOSIVE

HEAT - High-Explosive Antitank

HEDP - High-Explosive Dual Purpose

HEP - High-Explosive Plastic

HEP-T - High-Explosive Plastic-Tracer

HFC-134a - 1,1,1,2-Tetrafluoroethane, also called simply tetrafluoroethane, R-134a, Genetron 134a, Freon 134a or HFC-134a, is a haloalkane refrigerant without an ozone depletion potential and thermodynamic properties similar to R-12 (dichlorodifluoromethane). It has the formula CH2FCF3, and a boiling point of 26.6 °C (15.9 °F).

Hi-Cap - This term is used for all magazines with capacities in excess of 290 pellets (some up to 5,000) and can be one of two types, manual or battery controlled. With both types a toothed wheel is rotated to bring pellets from a reservoir, along a track and up into a channel into the gun. With one type this gear is turned manually while in the other a pressure sensitive pad is used to operate a battery powered electrical motor to perform the same function. These magazines are almost exclusively used in AEG type of guns and the obvious advantages is the greater number of rounds, which can be especially useful for automatic fire. The disadvantage is that the loose pellets can rattle and the noise could betray a players position to other competitors. Also, Hi-cap magazines are not allowed at most major airsoft events, where realism is often a prerequisite.

Hop-up - The term Hop-up describes the back-spin put on airsoft pellets and BB\'s to increase their range and (vertical) accuracy via Bernoulli\'s principle. Hop-up acts somewhat like the rifling on the barrel of a firearm, but without the increase in horizontal accuracy. Also, being light-weight, airsoft pellets are still affected by wind when fired. Airsoft hop-up devices apply a backspin to the pellet so that the pressure force acts on the pellet opposite to the direction that gravity is pulling it. This causes the pellet to fall less over a given distance than it would without the spin applied to it.

HP - Hollow Point (bullet)

HQ - headquarters

HUMINT - Human Intelligence 

I

Illum - Illumination

In. - Inch

Incen - Incendiary

IPW - Prisoner Of War Interrogation 

J

JHP - Jacketed Hollow Point 

K

KIA - Killed In Action

KIA - killed in action

KISS - Keep It Simple Stupid

kmph - kilometers per hour 

L

LAW - Light Antitank Weapon

Lb. - Pound

LBE - Load Bearing Equipment

LBV - Load Bearing Vest

LEO - Law Enforcement Officer

Low-Cap - Low cap mags hold no more than 100 rounds of ammo. They usually are made to make airsoft combat more realistic, by holding the same amount of rounds as the real firearm\'s magazine does.

LPEG - Some cheaper and lowered powered AEGs are called low powered electric guns (LPEGs) to distinguish them from the original, more expensive and more powerful AEGs even though their mechanical/electrical design and operation is similar and are not to be confused Mini Electrics (described below). Originally they were only of novelty value, often regarded below spring operated guns due to their construction and low velocities.

LZ - Landing Zone 

M 

m - Meters

MARPAT - Short for MARine Disruptive PATtern, is a pixelated camouflage pattern in use by the United States Marine Corps. The pattern comprises a number of small pixels of color (rectangular pixels). In theory, it is a far more effective camouflage than standard uniform patterns due to the way it mimics the dappled textures and rough boundaries found in natural settings. This is caused by how the human eye interacts with pixelated images. It is also known as the \"digital pattern\" or \"digi-cammies\" because of its micropattern (pixels) rather than the old macropattern (big blobs).

MAW - Medium Antitank Weapon

Max. - Maximum

MBR - Main Battle Rifle

MEDEVAC - Medical Evacuation

mercenary  - Soldier for hire.

MIA - Missing In Action

Mid-Cap - This is a loose category used to describe a type of magazine that has been modified to hold more rounds - usually between 100 and 200. Mechanically they still function like a standard magazine and as such keep the advantage of quiet operation over high-capacity magazines (that also require a winding mechanism), but minimize the disadvantage of a standard magazine\'s lower number of rounds.

Military Service Providers - see PMC

MilSim - MilSim (Military Simulation) generally combines airsoft play with some military live action role-playing elements. Several goals or missions are assigned to each team, along with a basic loadout of ammunition, (6 millimetre pellets) rations, batteries, and other suitable equipment. The teams will remain in the field for the duration of play, only returning to a staging area or \"safe zone\" for medical emergencies, or other such circumstances.

Min. - Minimum

mm - Millimeter

MOLLE - MOLLE (pronounced MOLLY as in the female name) is an acronym for MOdular Lightweight Load-carrying Equipment.

MOPP - Mission-Oriented Protective Posture

MOS - Military Occupational Specialty

MOUT - Military Operations On Urbanized Terrain

MPEG - Some companies - like UTG with their popular MP5 and AK47 models - have improved their quality to such an extent that some models are now considered simply as mid ranged AEGs that are more affordable but still reasonably effective. Among airsofters, these are commonly called middle powered electric guns(MPEG\'s).

MRE - Meal Ready to Eat

MSDS - Material Safety Data Sheet

MTP - Mission Training Plan

Multicam - MultiCam is a modern multi-environment camouflage pattern developed by Crye Associates in conjunction with U.S. Army Soldier Systems Center (also known as U.S Army Natick labs). Crye Associates does not currently have a contract to produce MultiCam for any US military service, but MultiCam is featured heavily in the U.S. Army \"Future Force Warrior\" program. The pattern is available to civilians.

MURS - Multi-Use Radio Service 

N

N/A - Not Applicable

NATO - North Atlantic Treaty Organization

NBC - Nuclear, Biological, Chemical

NCO - Noncommissioned Officer

NiCad - The nickel-cadmium battery (commonly abbreviated NiCd and pronounced \"nye-cad\") is a popular type of rechargeable battery using the nickel hydroxide (NiOH) and metallic cadmium (Cd) as the active chemicals.

NiMH - nickel metal hydride battery, abbreviated NiMH, is a type of rechargeable battery similar to a nickel-cadmium (NiCd) battery but has a hydrogen-absorbing alloy for the anode instead of cadmium. Like in NiCd batteries, nickel is the cathode. A NiMH battery can have two to three times the capacity of an equivalent size NiCd and the memory effect is not as significant. However, compared to the lithium-ion battery, the volumetric energy density is lower and self-discharge is higher.

NRA - National Rifle Association

Nuke - Nuclear

NVD - Night Vision Device

NVG - Night Vision Goggles 

O

Obj - Objective

O.D. – Olive Drab Green

OP - Observation Post

OPFOR - Opposing Force

Oz. - Ounce 

P

P - Phosorus

PAW - Post Apocalyptic World

PB - Patrol Base

PDF - Principal Direction Of Fire

Picatinny rail - The Picatinny rail (IPA: /\'pjkYÌtjni/ or /ÌpjkY\'tjni/) is a bracket used on some firearms in order to provide a standardized mounting platform for telescopic sights and other accessories, such as tactical lights and laser sighting modules. The standard was first published by the Picatinny Arsenal and carries the official title MIL-STD-1913. It is also known by the NATO designation STANAG 2324.

Plt - Platoon

PMCS - Preventive Maintenance Checks And Services

Private Military Industry - PMC private military company, private military contractors, Private Military Corporations. Private Military Firms. PSCs Private Security Contractors. ‘Contractors’.

Propane - Propane is a three-carbon alkane, normally a gas, but compressible to a liquid that is transportable. It is derived from other petroleum products during oil or natural gas processing. It is commonly used as a fuel for engines, barbecues, and home heating systems.

PSG - Platoon Sergeant

PW - Prisoner Of War

Q

QUAR - Quarantine 

R

RAP - Rocket-Assisted Projectile

RATELO - Radiotelephone Operator

RCLR - Recoilless Rifle

Rd - Round, Road

Recon - Reconnaissance

Red Gas - Chlorodifluoromethane or difluoromonochloromethane is a hydrochlorofluorocarbon (HCFC). It is better known under its code names of HCFC-22, R-22, Genetron 22 or Freon 22, and is commonly used in air conditioning applications, such as residential split systems in the US, rooftop units and window air conditioners. Under the name Red Gas it is used as a propellant for some airsoft guns.

RIS - Rail Integration Systems (RIS, sometimes also referred to as Rail Adapter Systems) are the primary method of attaching accessories to small firearms such as assault rifles (such as the American Colt M16 rifle and semi-automatic AR-15 civilian version which were originally designed by Colt), and light machine guns. This is done primarily in militaries and by fire-arm enthusiasts to improve the usability of the weapon being accessorized quickly and efficiently without requiring the weapon operator to field-strip the weapon. Most quality RIS Picatinny rail systems are built to the M1913 Picatinny standards, which was the first standard developed.

ROE - Rules Of Engagement

RPG - Rocket Propelled Grenade, Roll Playing Game

Rpm - Revolution Per Minute 

S

SALUTE - Size, Activity, Location, Unit, Time, And Equipment

SAW - Squad Automatic Weapon

SBR - Short Barreled Rifle

Sec. - Section, Second

SERE - Survival, Evasion, Resistance, & Escape

Semi-automatic - A semi-automatic gun is a gun that requires only a trigger pull for each round that is fired, unlike a single-action revolver, a pump-action gun, a bolt-action gun, or a lever-action gun, which require the shooter to manually chamber each successive round. If someone were to shoot ten rounds in a semi-automatic gun, the trigger would need to be pulled ten times (once for each round fired), as opposed to a fully automatic gun, which will continue to fire as long as the trigger is held or until it runs out of ammunition.

SFC - Sergeant First Class

SGT - Sergeant

SL - Squad Leader

SNAFU - Situation Normal, All Fouled Up

SOP - Standing Operating Procedure

Spec Ops - Special Operations

Springer - Spring-powered airsoft guns are single-shot devices that use potential energy stored in a spring to launch an airsoft pellet down the barrel of the gun. The user must cock a spring gun prior to each shot. This is typically achieved by pulling back the slide (pistols), bolt (rifles), or the grip on a shotgun, which in turn compresses the spring and makes the gun ready to fire. Because of this, these guns are by definition incapable of automatic or semi-automatic fire.

Sqd - Squad

SSG - Staff Sergeant

SSN - Social Security Number 

T

TACSOP - Tactical SOP

TL - Team Leader

tm - Team

TOW - Tube-Launched, Optically Tracked, Wire-Guided 

U

US - United States 

V 

W

w/ - With

Weaver rail - A Weaver rail mount (Picatinny type) is a system to connect telescopic sights and other accessories to rifles, shotguns, pistols, archery bows, etc. The slot spacing in the Weaver rail is 3.8 mm, while the slot spacing on the Picatinny rail is 5 mm. Therefore, although they look similar, devices built for the two are not entirely interchangeable. While it is often possible to attach a Weaver mount device to a Picatinny rail, the dimension mismatch in the slot is large enough that a robust attachment is impossible for devices that click into the slots. Devices fastened to the rail by side screws or grips are usually interchangeable.

WP - White Phosphorus

Wpn - Weapon 

X

XO - Executive Officer 

Y 

Z

Zeds - Zombies

ZEMA- Zombie Emergency Management Agency

ZPAW - Zombie Post Apocalyptic World

Zulu - Refers to Greenwich Mean Time (GMT), also refers to Zombies

~Trooper