by Max Barry

Latest Forum Topics

Advertisement

19

DispatchAccountMilitary

by The Unitary Technocracy of Etoile Arcture. . 113 reads.

AH-M16 Offensive/Defensive Hand Grenade System

This page is a work in progress by its author and should not be considered final.

M8A1 Defensive Hand Grenade

Type

Hand grenade

Place of origin

Etoile Arcture

Service history

In service

2011 - present

Used by

See Users

Production history

Designer

Sequoia Dynamics

Designed

2003-2009

Manufacturer

Sequoia Dynamics
Armament And Tech
-nical Products

Unit cost

US$?

Number built

many millions

Variants

See below

Specifications

Weight

340.2 g (12 oz)

Length

84 mm

Diameter

60 mm


Filling

FOX-7

Filling weight

90 g (3.175 oz)

Detonation
mechanism

electronic time delay -
4.5 ± 0.25 seconds

Commonly used grenades of the NS World compared, from left to right: Halcyon Arms M90 (Pharthan), Lyran Arms LY1002
Hellsbreath (Lyras), Argus Industrial Manufacturing Model 6 series (Amastol), and Sequoia Dynamics
Armament And Technology Products AH-M16 series (Etoile Arcture), illustrating compact dimensions.

M8A2 Offensive Hand Grenade

Type

Hand grenade

Place of origin

Etoile Arcture

Service history

In service

2011 - present

Used by

See Users

Production history

Designer

Sequoia Dynamics

Designed

2003-2009

Manufacturer

Sequoia Dynamics
Armament And Tech
-nical Products

Unit cost

US$?

Number built

many millions

Variants

See below

Specifications

Weight

286 g (10 oz)

Length

84 mm

Diameter

60 mm


Filling

PAX-41

Filling weight

180 g (6.3 oz)

Detonation
mechanism

electronic time delay -
4.5 ± 0.25 seconds

The AH-M16 Offensive/Defensive Hand Grenade System is a family of munitions that employ controlled fragmentation and/or blast overpressure effects to produce casualties against personnel and light matériel targets in closed and open terrain. The AH-M16 is produced in both fragmentation and concussion (blast) models in two patterns comprising the following elements tightly form-fitted together. The defensive pattern, or M8A1 DEF, has an outer synthetic rubber body and inner fragmentation liner surrounding a bursting charge, and the offensive pattern, or M8A2 OFF, has an inner plastic core containing the bursting charge without any fragments. Both patterns are designed to be highly effective within a limited blast and fragmentation radius to minimise the hazard to friendly troops during close combat, using novel explosives that are lighter, safer to store and handle, low smoke producing, and with with higher detonation velocities for improved lethality. In place of a traditional fly-off lever, striker mechanism, pyrotechnic delay and igniter, an electro-mechanical precision timed delay fuze of greater reliability and predictability is used to safe, arm and detonate the grenades.

Design


Grenade body

The ovoid outer body of the grenade is made from Kraton polyamide synthetic rubber, a highly durable thermoplastic elastomer that is impact, scratch, oil, moisture and heat resistant. The rubber-like gripping surface has a dimpled non-slip texture and is moulded with transversal and longitudinal ribs that provide a sure one-handed grip when handled wet or while wearing gloves or mittens, tactile identification of the pattern, and prevents the grenade from slipping or skipping on hitting the ground for accurate placement when thrown. The outer body is injection moulded around a fragmentation sleeve and/or bursting charge depending on pattern. A multi-part fuse assembly is manufactured as a separate piece of injection-moulded plastic that inserts into a central threaded fuze-well on the top surface of the grenade to form a watertight seal. All parts are fully waterproof and will function after immersion in 300 mm of water. The small profile, light weight and ovoid shape aid aerodynamics to maximise throw distance and accuracy.

Bursting charge

The defensive pattern uses a poured waxed FOX-7 (1,1-diamino-2,2-dinitroethylene) plastic-bonded explosive filler with a detonation velocity of about 8,870 m/s optimised for accelerating fragments. The offensive pattern uses a melt-cast PAX-41 (2,4-dinitroanisole,1,3,5-trinitrohexahydro-s-triazine,N-methyl-p-nitroaniline) enhanced blast explosive filler arranged to produce a 193 KPa (28 psi) low-overpressure shock wave sufficient to induce hydrostatic shock in enemy troops and concussive effects to demolish structures. Both explosives conform to IM (insensitive munition) standards that are unaffected by environmental conditions such as temperature, humidity, shock, and are resistant to accidental detonation even by bullet strikes, electrical discharges and high temperatures.

Fragmentation sleeve

The fragmentaton sleeve is provided on the defensive pattern only providing a high density double layer of 4,000 pre-formed ball fragments set in an injection-moulded matrix of polystyrene. The sleeve is geometrically shaped to produce a concentrated and symmetrical 360° distribution of shrapnel to deliver high hit probabilities around the point of detonation. Each pre-formed fragment is a Φ2mm diameter high hardness steel ball with an average density of 7.833 g/cm³ and average mass of 0.03263 g, and are acclerated at a fragmentation speed of 1,828 m/s to produce a high effective kill probability of 90% within 5-6 metres of the burst point. The ball fragments exhibit predictable speed, inertia, range and penetration characteristics that reduce the risk of fratricide during close combat, with a very high initial velocity to defeat body armour that rapidly decays out to 15 metres due to their low mass. A low fragmenting plastic body and fuse ensures no dangerous fragments are projected beyond the safety radius.

Fuze assembly

The M8 series has a non-pyrotechnic electro-mechanical fuze designed for maximum reliability and consistency with a timing accuracy of ± 0.25 seconds that is unaffected by temperature, humidity, pressure or other environmental factors. The hardware consists of a spring-driven electromagnetic signal generator, dual electronic delay timers connected in parallel, an electrical stab detonator, a snag-free twist-and-pull safety pin lying flush over the top surface to allow ambidextrous handling, and a spring-loaded safety lever that remains attached after the grenade is thrown. The fuze does not store any electrical energy, and the detonator circuits are physically out of line with each element in the explosive train and isolated from the activation circuit for maximum safety allowing safe storage, handling and transport of the grenade as an inert 'wooden' round until use.

Operation

The fuze generates the electrical energy needed for the detonator only after removal of the safety pin after application of a substantive 39.22 newtons (4 kilos) of force and deliberate 70° of travel. The dual timers are initiated only on release of the safety lever as the weapon is thrown - the lever remaining fixed to the body, and operating silently so as not to alert enemy troops to its employment. This sequence energises the first out-of-line delay circuit consisting of a throwing safety delay preset at 3.5 seconds, maintaining the insulation between the detonator and the activation circuit, followed by the detonator delay preset at 1 second. The second delay discharges the generated electrical energy into the stab detonator to detonate the primary explosive charge of the munition.

Variants


As described the AH-M16 family consists of an anti-personnel fragmentation grenade (M8A1 DEF) for close combat operations in open terrain, and a non-fragmenting concussion grenade (M8A2 OFF) that is most effective in enclosed areas such as bunkers, or semi-enclosed areas such as trenches, as well as for blasting and demolition tasks and as a distraction device. In addition are two training patterns, an inert ballasted reusable drill grenade (coloured yellow) for throwing practice with a solid moulded fuse assembly, and a non-fragmenting safety practice grenade (coloured blue) containing an igniter and pyrotechnic charge to simulate the flash, smoke and report of a service grenade. The latter has an altered thread pattern in the fuze well so the fuse from a live grenade cannot be threaded into an inert or practice body, and vice versa.

Users


Etoile Arcture

  • Etoile Arcture Ground Forces

Arcturia

  • Armée de Terre


Astograth

  • Astograthian Army

Eothasia

  • Crowned Eothasi Army

Monavian Empire

  • Monavian Imperial Army

  • Monavian Royal Marine Corps

Telegram for purchasing options. Please consider approving this dispatch to increase its visibility.

Specifications


AH-M16 Offensive/Defensive Hand Grenade System

Model

M8A1 Defensive Hand Grenade

M8A2 Offensive Hand Grenade

Body diameter

60 mm

60 mm

Overall height

84 mm

84 mm

Weight

340.2 g (12 oz)

286 g (10 oz)

Fuse delay

4.5 ± 0.25 sec

4.5 ± 0.25 sec

Explosive filler

FOX-7

PAX-41

Explosive filler weight

90 g (3.175 oz)

180 g (6.3 oz)

Peak overpressure

0.89 bar (12.9 psi)

1.93 bar (28 psi)

Preformed fragments

Φ2.0 mm steel balls

n/a

Number of fragments

4,000

n/a

Fragment weight

130.5 g (4.6 oz)

n/a

Fragment density

20/m²

n/a

Lethal radius

6 m

n/a

Casualty radius

15 m

2 m

Safety radius

20 m

5 m

Penetration

STANAG 4569 Level 2
(NIJ Level IV)

n/a

Throw range

30~40 m

30~40 m

Operational temperature

-46 to +71°C

-46 to +71°C

Storage life

10~15 years

10~15 years

RawReport