AR-15 SCOPE MOUNTS - (Pistol sights) FAQ

AR-15 Acronyms A

A1 - Of or referring to a characteristic of the M16A1 (for example, an A1 rear sight)
A2 - Of or referring to a characteristic of the M16A2 (for example, an A2 flash hider)
A3 - Of or referring to a characteristic of the M16A3, or (in civilian parlance) a flat-top receiver. Note that the M16A3 is essentially just a full-auto M16A2, but civilian manufacturers began using the term A3 for flat-top receivers before the military adopted the M16A3 and M16A4, so there is divergence between military and civilian usage of the term "A3". Without a definitive military context, it is most likely that "A3" refers to a flat-top, civilian upper receiver. Note also that some civilian manufacturers call their flat-tops A3, others A4.
A4 - Of or referring to a characteristic of the M16A4 (for example, a flat-top A4 upper receiver)
ABC - Armalite, Bushmaster and Colt (considered by many to be the top three manufacturers of AR-15)
ABCR - Armalite, Bushmaster, Colt and Rock River Arms (a variant of ABC used by those who also consider Rock River Arms to be a top-tier manufacturer)
ACOG - Advanced Combat Optical Gunsight (see Trijicon's website)
ACR - Advanced Combat Rifle (a late 1980's weapon development program intended to replace the M16 - more detail here)
AD - Accidental Discharge (a non-negligent unintentional discharge of a weapon that could not have been reasonably forseen and prevented - e.g. a caused by an unexpected mechanical failure)
ADCO - Not an acronym, just a name (retailer of AR-15s and accessories, provider of AR15 gunsmithing services - website)
AF - Air Force
AFAIK - As Far As I Know
AGNTSA - Aww Geez Not This Stuff Again (substitute more colorful noun for "Stuff" as desired)
AJNTSA - Aww Jeez Not This Stuff Again (substitute more colorful noun for "Stuff" as desired)
AOW - Any Other Weapon (any weapon capable of discharging a shot that is not otherwise categorized under the NFA)
AR - ArmaLite (see explanation here)
ARD - Anti-Reflection Device (a device placed on the objective of an optic to reduce reflections and glare)
ARF - AR15.COM (this site)
ARFCOM - AR15.COM (this site)
ARFCOMMER - One who is a member of this site
A.R.M.S. - Atlantic Research Marketing Systems (manufacturer of rail mounts, systems and accessories - website)
ASA - American Spirit Arms (manufacturer of AR-15 rifles, rifle kits, parts and accessories - website)
ASAR - Abrams Small Arms Research (website)
ATN - American Technologies Network (manufacturer and distributer of weapon optics and night vision equipment - website)
AWB - Assault Weapons Ban
AWOB - Another Waste Of Bandwidth (derogatory comment made by someone who wishes to point out what they consider to be a pointless thread/Ghillie suits.)

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AR-15 Acronyms L - Night Sights

LAR - L.A.R. Manufacturing (www.largrizzly.com/)
LC - Lake City (a federally owned, contractor operated plant in Missouri where small arms ammunition is made for the U.S. military)
LCW - Lauer Custom Weaponry (gun refinishing and camouflaging services - website)
LE - Law Enforcement
LEGP - Limited Edition Group Purchase
LEO - Law Enforcement Officer
LEO - Law Enforcement Only (an item that can legally be used only by law enforcement agencies and their Night Sights)
LL - Lightning Link (a device for converting a semi-automatic gun to full-auto. By itself considered to be a machine gun under the NFA, and unregistered ones are illegal to even possess with, let alone install in, the guns they convert)
LMAO - Laughing My A$$ Off
LMK - Let Me Know
LMT - Lewis Machine and Tool (manufacturer of AR-15 uppers and accessories - website)
LOL - Laugh Out Loud
LOP - Length Of Pull (the distance from the face of the trigger to the end of the buttstock)
LPK - Lower Parts Kit
LRC - Living Room Commando (a person who buys and opines on expensive tactical gear but who has no actual combat or law enforcement training or Gun Accessories)
LULA - Loader/Unloader Accessory (for fast loading and unloading of magazines - website)
LW or L-W - Leitner-Wise (manufacturer of weapons based on the AR-15 platform, including .499 and gas-piston Gun Accessories - website)
LW - Lightweight

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