XM21 (S.O.G.)

WIP: This page is currently a Work-In-Progress. Information contained in this article is either incomplete or missing and is subject to review.

NOTE: This article is about the XM21 sniper rifle featured in ArmA 3's S.O.G. Prairie Fire Creator DLC. For other similarly named articles, you may wish to use the following links instead: ■ For the M21/M21 SWS in ArmA: CWA/ARMA Reforger, see M21. ■ For the M21 in CSLA Iron Curtain, see M21 (CSLA).

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The US Army wanted an accurate sniper rifle during the Vietnam War. The M14 was selected because of its accuracy, reliability, and the ability for a quick second shot. In 1969 National Match-grade M14 rifles were converted by adding a 3-9x Adjustable Ranging Telescope (ART) sight and supplying Match-grade ammunition, and designating it the XM21 Sniper Weapon System. Field Manual

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The XM21 7.62 mm sniper rifle.

XM21 7.62 mm
Faction	MACV-SOG Australia New Zealand ROK ARVN
Type	Sniper Rifle
Calibre	7.62×51 mm
Magazine capacity	20 / 10
Dispersion	0.0007 rad
Mass	100
Variants	M14
Games

The XM21 is a 7.62 mm sniper rifle used by several BLUFOR and INDFOR factions in ArmA 3. It was added with the release of the S.O.G. Prairie Fire Creator DLC.

Overview

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The XM21 is an M14 rifle that has been configured and reclassified as a sniper rifle.

It shares the same 20-round box magazines used by the M14 and can similarly load (optional) reduced capacity 10-round magazines. The XM21 shares an identical muzzle velocity of 850 m/s and variable fire rate depending on the selected fire mode: ~ 750 rounds per minute (semi-auto) or ~ 740 RPM (full-auto).

By default, XM21s are always fitted with a day sight that has a magnification of 3x-9x, though it can be swapped with a first generation night vision scope or removed altogether to only use the XM21's ironsights (with a zeroing range beginning at 100 metres up to 600 metres).

XM21s can mount the same dedicated sound suppressors designed for use on the M14, and can also be fitted with a bayonet and camouflage wrap over the barrel. However, it should be noted that attaching a suppressor at the same time with a bayonet will disable use of the latter; the suppressor must be removed first if the user intends on employing the bayonet's melee attack.

Sights

• Optics (XM21 3-9x)
• Ironsights (XM21)

The XM21's day sight can be manually zeroed starting from a minimum of 100 metres up to a maximum of 1,000 metres (100, 200, 300, 400, 500, 600, 700, 800, 900, 1000). It uses a default zeroing of 200 metres.

If the XM21's default scope is removed, its ironsights can be used to aim with instead. The XM21's ironsights allow for manual zeroing starting from a minimum of 100 metres up to a maximum of 600 metres (100, 200, 300, 400, 500, 600). By default, the XM21's ironsights are set to utilise a zeroing of 100 metres.

Melee

Without a bayonet affixed, the user will strike targets with a buttstroke instead. This applies to all XM21 configurations regardless of the mounted type of scope or whether it has one attached to begin with. Melee attacks can inflict a maximum of up to 7 points of damage to the target if the buttstroke lands successfully.

It should be noted that melee attacks will drain 7.2 points of stamina whenever a buttstroke (or bayonet stab) is performed.

Ammunition

NOTE: The XM21 is capable of loading the same magazines utilised by non-S.O.G. 7.62 mm-chambered weapons. To minimise clutter, they are deliberately excluded from this section.

Base damage value	Aerodynamic friction	Initial velocity (m/s)	Penetration depth (mm)
12	-0.0012	853	20.472

XM21s can be loaded with four types of magazines. They can be shared with conventional M14 battle rifles but not with L1A1s and the L2A1 LMG:

20Rnd. M14 Mag

Standard 20-round box magazine loaded with 7.62 mm ball ammunition. Weighs a "mass" of 12 units.

Every fourth round fired will comprise of a visible tracer. Only the last four rounds of the magazine will consist entirely of tracer rounds.

20Rnd. M14 Mag (Tracer)

Alternate 20-round box magazine loaded exclusively with visible tracer ammunition.

10Rnd. M14 Mag

Reduced capacity box magazine with only ten rounds. It has half the weight (6 "mass") but remains otherwise identical to the 20-rounder magazines.

10Rnd. M14 Mag (Tracer)

Identical to regular 10-round magazines but loaded solely with visible tracers.

Trivia

• Like its parent rifle, the sling on all XM21s is purely cosmetic and does not apply any benefits in actual gameplay.

Gallery

External links

• Wikipedia: M21 Sniper Weapon System

See also

Variants

• M14

Weapons of comparable role and configuration

• M40 (Alternate MACV-SOG counterpart)

Australia - Armoury (S.O.G. Prairie Fire)
Handguns	HP 9 mm
Submachine guns	F1 SMG 9 mm • Sten Mk.II 9 mm
Carbines	XM177E2 XM148 5.56 mm
Rifles/Assault rifles	L1A1 7.62 mm (XM148, Rifle Grenade, SAS) • M16A1 5.56 mm (M203, XM148)
Squad automatic weapons	L2A1 LMG 7.62 mm
Machine guns	M60 7.62 mm (Shorty)
Designated marksman rifles	M14 7.62 mm
Sniper rifles	XM21 7.62 mm
Grenade launchers	M79 (Sawn-off)
Launchers	M127 Flare Launcher • M72 LAW
Static	M2 Mortar • M2HB • M29 Mortar • M40A1 Recoilless Rifle • M60 • M101 Howitzer
(Parenthesis) denote variants.

New Zealand - Armoury (S.O.G. Prairie Fire)
Handguns	HP 9 mm
Submachine guns	Sten Mk.II 9 mm
Carbines	XM177E2 XM148 5.56 mm
Rifles/Assault rifles	L1A1 7.62 mm (XM148, Rifle Grenade, SAS) • M16A1 5.56 mm (M203, XM148)
Squad automatic weapons	L2A1 LMG 7.62 mm • L4 LMG 7.62 mm
Machine guns	M60 7.62 mm (Shorty)
Designated marksman rifles	M14 7.62 mm
Sniper rifles	XM21 7.62 mm
Grenade launchers	M79 (Sawn-off)
Launchers	M127 Flare Launcher • M72 LAW
Static	M2 Mortar • M2HB • M29 Mortar • M40A1 Recoilless Rifle • M60 • M101 Howitzer
(Parenthesis) denote variants.

Republic of Korea - Armoury (S.O.G. Prairie Fire)
Handguns	.38 Revolver • M1911 .45 • Model 10 .38
Submachine guns	M1A1 Tommy Gun .45 (M1928A1) • M3A1 Grease Gun .45
Shotguns	M1897
Carbines	XM177E2 5.56 mm
Rifles/Assault rifles	M1 Garand 7.62 mm (Rifle Grenade) • M16A1 5.56 mm (E1)
Squad automatic weapons	M1918A2 7.62 mm
Machineguns	M60 7.62 mm
Sniper rifles	XM21 7.62 mm
Grenade launchers	M79
Launchers	M72 LAW
Static	M2 Mortar • M2HB • M29 Mortar • M40A1 Recoilless Rifle • M60 • M101 Howitzer • M1919A4
(Parenthesis) denote variants.

ARVN - Armoury (S.O.G. Prairie Fire)
Handguns	.38 Revolver • M1911 .45 • Model 10 .38
Submachine guns	M1A1 Tommy Gun Shorty .45 • M3A1 Grease Gun .45
Shotguns	M1897
Carbines	XM177E2 Short 5.56 mm
Rifles/Assault rifles	M16A1 5.56 mm (E1)
Squad automatic weapons	M1918A2 7.62 mm
Machineguns	M60 7.62 mm
Sniper rifles	XM21 7.62 mm
Grenade launchers	M79
Launchers	M72 LAW
Static	BGM-71 TOW • M2 Mortar • M2HB • M29 Mortar • M40A1 Recoilless Rifle • M45 Quadmount • M60 • M101 Howitzer • M1919A4 (M1919A6)
(Parenthesis) denote variants.