Underbarrel grenade launcher (ArmA 2)

This article lists the specifications for underbarrel grenade launcher rounds featured on certain weapon platforms in ArmA 2.

Overview

M16A2 rifle with an M203 UGL.

Just like in Armed Assault, ArmA 2's UGL rounds differ depending on platform and faction and are not interchangeable with each other.

For instance, a Russian-made assault rifle like the AK-107 utilises the GP-25; it is not possible to load its 40 mm caseless grenades into an American-made M203 UGL on the M16A4.

Furthermore, it is now possible to load and fire smoke shell rounds which can be used in lieu of handheld smoke grenades. Compared to the latter, UGL-fired smoke shells can be dispersed at greater distances (>350 metres) and depending on the user's aiming proficiency, are more precise as well.

One notable change from Armed Assault relates to standalone grenade launcher-type weapons like the M32. In addition to feeding from their own grenade cylinder "magazines", these launchers are now able to load individual grenade rounds. However, aside from their capacity their functionality remains unchanged.

List of weapons with UGLs attached

The following weapon platforms all feature at least one or more sub-variants fitted with a UGL:

• AK-74 GP-25 (5.45 mm)
• AK-107 GP-25 (5.45 mm)
• CZ 805 B1 G1 (7.62 mm)
• L85A2 UGL (5.56 mm)
• M4A1 M203 (5.56 mm)
• M4A3 M203 (5.56 mm)
• M16A2 M203 (5.56 mm)
• M16A4 M203 (5.56 mm)
• Mk16 EGLM (5.56 mm)
• Mk17 EGLM (7.62 mm)
• XM8 M320 (5.56 mm)

In addition to mounted UGLs, several standalone grenade launcher-type weapons exist which mostly share the same functionality as their underbarrel counterparts:

• M32
• M79
• Mk13

Grenade types (GP-25)

GP-25s can load nine types of grenade "magazines". All grenade rounds compatible with the GP-25 occupy a single secondary weapon inventory slot regardless of their payload:

Parameter	40 mm GP-25 HE	40 mm GP-25 Flare	40 mm GP-25 Smoke
Base damage value	12	5	5
Splash damage value	10	2	2
Warhead type	High-Explosive	Flare	Smoke
Blast radius (metres)	5	0.2	0.2
Muzzle velocity (m/s)	80	80	80
Duration (seconds)	Detonates on impact	40	60
Deflection angle (degrees)	5°	15°	20°

• High-Explosive (HE): Effective against clustered infantry and unarmoured ground vehicles. Has a blast radius of 5 metres.
• Flare: Illumination/signalling round. Burns for up to 40 seconds until the flare expires.
• Smoke: Concealment/marking round. The grenade will ignite 2 seconds after being launched. It takes approximately 10 seconds for a cloud to fully form. The grenade will continue to emit smoke for up to 60 seconds before it expires.

The GP-25's HE grenades have a minimum fuse range of 15 metres. They will not detonate under any circumstances unless the grenade flies beyond that distance. Flare and smoke rounds are available in white, green, red and yellow colour varieties. There are no performance differences between the colours. Both smoke and flares do not have a minimum fuse range.

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Weapon name (Classname)	GP-25 HE	GP-25 Flare White	GP-25 Flare Green	GP-25 Flare Red	GP-25 Flare Yellow	GP-25 Smoke	GP-25 Smoke Red	GP-25 Smoke Green	GP-25 Smoke Yellow
GP-25 (GP25Muzzle)	✔	✔	✔	✔	✔	✔	✔	✔	✔

Grenade types (M203)

M203-type launchers can feed from nine types of grenade "magazines". The M32 is the only weapon which features its own dedicated 6-round cylinders, which raises this to a total of eighteen "magazines".

However with the exception of the M32's 6-round cylinders, M203-compatible 40 mm rounds are also considered to be "magazines" for the user's secondary weapon and will occupy the same inventory slots as sidearms (only the M32's cylinders take up two primary weapon "magazine" slots):

Parameter	40 mm M203 HE	40 mm M203 Flare	40 mm M203 Smoke
Base damage value	12	5	5
Splash damage value	10	2	2
Warhead type	High-Explosive	Flare	Smoke
Blast radius (metres)	5	0.2	0.2
Muzzle velocity (m/s)	80	80	80
Duration (seconds)	Detonates on impact	40	60
Deflection angle (degrees)	5°	15°	20°

• High-Explosive (HE): Effective against clustered infantry and unarmoured ground vehicles. Has a blast radius of 5 metres.
• Flare: Illumination/signalling round. Burns for up to 40 seconds until the flare expires.
• Smoke: Concealment/marking round. The grenade will ignite 2 seconds after being launched. It takes approximately 10 seconds for a cloud to fully form. The grenade will continue to emit smoke for up to 60 seconds before it expires.

With the exception of smokes/flares, the M203's HE grenade rounds have a minimum fuse distance of 15 metres. If any HE round impacts the terrain or an object below this range, they will not explode and will eventually disappear after 20 seconds.

The M203's flare shells and smoke grenades are available in either red, white, green or yellow colour options. There are no functional or statistical differences between the colours.

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Weapon name (Classname)	M203 HE	M203 Flare White	M203 Flare Green	M203 Flare Red	M203 Flare Yellow	M203 Smoke	M203 Smoke Red	M203 Smoke Green	M203 Smoke Yellow	6x40mm HE gnds	M203 Flare White	M203 Flare Green	M203 Flare Red	M203 Flare Yellow	M203 Smoke	M203 Smoke Red	M203 Smoke Green	M203 Smoke Yellow
M203 (M203Muzzle)	✔	✔	✔	✔	✔	✔	✔	✔	✔	✗	✗	✗	✗	✗	✗	✗	✗	✗
L123 40mm UGL (BAF_L17_40mm)	✔	✔	✔	✔	✔	✔	✔	✔	✔	✗	✗	✗	✗	✗	✗	✗	✗	✗
M320 (XM320Muzzle)	✔	✔	✔	✔	✔	✔	✔	✔	✔	✗	✗	✗	✗	✗	✗	✗	✗	✗
M32 (M32_EP1)	✔	✔	✔	✔	✔	✔	✔	✔	✔	✔	✔	✔	✔	✔	✔	✔	✔	✔
M79 (M79_EP1)	✔	✔	✔	✔	✔	✔	✔	✔	✔	✗	✗	✗	✗	✗	✗	✗	✗	✗
Mk13 (Mk13_EP1)	✔	✔	✔	✔	✔	✔	✔	✔	✔	✗	✗	✗	✗	✗	✗	✗	✗	✗
EGLM (EGLMMuzzle)	✔	✔	✔	✔	✔	✔	✔	✔	✔	✗	✗	✗	✗	✗	✗	✗	✗	✗
CZ 805 G1 (M203Muzzle)	✔	✔	✔	✔	✔	✔	✔	✔	✔	✗	✗	✗	✗	✗	✗	✗	✗	✗

Trivia

• The British Army's UGL is the only underbarrel grenade launcher in ArmA 2 that features a functional leaf sight "reticle" that appears when the user attempts to aim with it. All other UGLs force the player to rely on their crosshairs or the weapon's front sight (if available) for range estimation.
• After the release of the latest Steam version patches, several tweaks were made to UGLs and their ammunition while a few AI-related bugs were also fixed:
  • AI-controlled units with UGL-fitted weapons now have the ability to aim and fire grenades properly (fixed by the Community Configuration Project). At ArmA 2's launch, UGL-armed units would either not use their launchers at all or would fire them completely off-target (sometimes missing their targets by hundreds of metres). The CCP would add unique AI-exclusive "muzzles" to each UGL-equipped platform so that they will automatically switch to their own unique versions of the M203/EGLM/XM320/GP-25.
  • Smoke grenades had extremely high deflection values that would cause the grenades to bounce like as if they were rubber balls (also fixed by the CCP). Combined with ArmA 2's physics simulation, this would render smoke grenades useless for concealment purposes since they would always bounce far away unless they were launched directly at the user's feet.
  • Flares would cause the textures of all objects within the flare's area-of-effect to experience a flickering graphical bug (fixed by CorePatch).

Gallery

AK-74 with a GP-25.

AK-107 with a GP-25.

CZ 805 BREN B1 fitted with the G1.

M16A2 with an M203.

M16A4 with an M203.

M4A1 fitted with the M203.

M4A3 with an M203.

Mk16 with an EGLM.

Mk17 fitted with an EGLM.

Config/script references

CfgAmmo CfgMagazines

See also

• Underbarrel grenade launcher (ArmA)
• Underbarrel grenade launcher (ArmA 3)