tullo_1 - WAG - Wild Ass Guess WECSOG - Wile

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WAG - Wild Ass Guess
WECSOG - Wile E. Coyote School Of Gunsmithing (unconventional, unprofessional [although not necessarily poor quality], make-do with what you've got gunsmithing - usually done at home with few tools, often involving a file and/or hammer)
WOA - White Oak Armament (retailer of AR-15 parts - website)
WOP - White Oak Precision (builder of custom AR-15 and AR-10 uppers - website)
WSSM - Winchester Super Short Magnum
WTB - Want(ed) To Buy
WTF - What The F**k
WTK - Want(ed) To Know
WTS - Want(ed) To Sell
WTT - Want(ed) To Trade
WWB - Winchester White Box (In AR-15 context, Q3131A ammunition made in Israel to M193 specifications - relatively inexpensive but reliable general purpose ammo)

XCR - eXchangeable Caliber Rifle* (Robinson Armament's modular battle rifle, originally intended as a SCAR contender)
XM193 - M193 ammunition packaged for sale to civilians (may fail to meet some aspect of military standard - see the Ammo Oracle)
XM8 - Designation of a modular weapon system that may replace the M16 family of rifles. Adoption of the XM8 is uncertain. (brochure, overview)

YHM - Yankee Hill Machine (manufacturer of rails, mounts, forearms, sights and other AR-15 accessories - website)
YMMV - Your Mileage May Vary

Z - Zero (marked on some A2-style rear sight elevation knobs to indicate the position at which the knob should be set when establishing a battlesight zero on a 25-meter range according to standard military doctrine)
ZM - Z-Man or Zitta-Man {Weapons} (manufacturer of the LR-300 op-rod gas system upper/rifle and LR-300/AR-15 accessories - website)

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.)

mspmwg4