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The ADS is said to be under extensive [[field trials]] by undisclosed units of Russian Naval special forces. If adopted, it will replace APS underwater weapons and, possibly, some AK-74M general issue assault rifles in service with Russian Navy special operation units and other Russian special forces, which might be engaged in underwater operations (security, counter-terrorism in the sea, etc).
The ADS is said to be under extensive [[field trials]] by undisclosed units of Russian Naval special forces. If adopted, it will replace APS underwater weapons and, possibly, some AK-74M general issue assault rifles in service with Russian Navy special operation units and other Russian special forces, which might be engaged in underwater operations (security, counter-terrorism in the sea, etc).

==External links==
*{{ru icon}} [http://www.dogswar.ru/strelkovoe-oryjie/avtomaty/3610-dvyhsrednyi-avtomat-.html ADS amphibious rifle from DogsWar.ru]
*{{ru icon}} [http://www.dogswar.ru/strelkovoe-oryjie/avtomaty/3609-specialnyi-podvodnyi.html APS amphibious rifle from DogsWar.ru]


==References==
==References==

Revision as of 09:37, 18 February 2011

ADS amphibious rifle
TypeAmphibious assault rifle
Place of origin Russia
Specifications
Mass4.6kg
Length660mm
Barrel length415mm

Cartridge5.45x39mm M74 7N6 / 7N10 / 7N22 for above-water fire
5.45x39mm PSP or PSP-U for under-water fire
ActionGas operated, rotating bolt
Rate of fire600-800rpm
Feed system30 round box magazine
SightsIron, picatinny rail exists for mounting red dot/night/optical sights


The ADS is an Assault rifle of Russian origin specially made for combat divers. It is of a bullpup layout and is chambered in the 5.45x39mm M74 round. The ADS can adapt a GP-30 type underbarrel grenade launcher and optical sights.

For several decades, Soviet and then Russian combat divers and naval commando units were armed with special weapons for underwater combat, including the [[SPP-1] pistol and APS underwater assault rifle. The main drawback of these weapons is that their effectiveness (and life expectancy) for use above the water is severely degraded compared to standard 'above water' weapons. Therefore, combat divers and other Spetsnaz units, when engaged in amphibious operations (below the water and above), had to carry on the mission two types of weapons - one for underwater use and another for use when on shore or on board of enemy surface vessels. The first known attempt to produce a single weapon which could be effectively used either below or above the water was the ASM-DT experimental 'dual-medium' or amphibious assault rifle, developed in Tula in around 2000. The main problem with ASM-DT was that it still had to use extremely long, specially designed underwater ammunition when submerged, which necessitated overly long receiver, complicated magazine well of adjustable size and two types of magazines. This was found unsuitable for combat use, and further development commenced at the famous arms development facility KBP (Instrument Design Bureau) in Tula. By 2005, design team at KBP has successfully developed effective underwater ammunition which retains the compact size of the standard issue 5.45x39 7N6 ball (as well as 7N10 and 7N22 AP) rounds, and thus can be loaded and fired from standard AK-74-type box magazines, and, more importantly, fired from the same chambers and barrels that would accept the 'above-water' 7N6 ammunition.

This new cartridge is known as 5.45x39 PSP, and is externally similar to standard 5.45x39 ammunition except that it has a different bullet shape. Internally it differs in having a long bullet, which has specially calculated shape and protrudes back into the cartridge case all the way to the bottom, with overall bullet length being about 53mm (2.1 inch), compared to overall cartridge length of 57mm. There are two types of PSP ammunition, the 5.45 PSP (combat ammunition) with hardened steel projectile weighting 16 gram (muzzle velocity on air about 330 m/s) and 5.45 PSP-U (practice / training ammunition) with bronze projectile weighting 8 gram (muzzle velocity on air about 430 m/s). Effective range with PSP ammunition varies from 25 meters at 5 meters depth to 18 meters at 20 meters depth; effective range of the PSP-U training ammunition when below the water is about half.

Having settled on new ammunition, a designer at KBP commenced work on the new weapon, well suitable for both surface and underwater combat. This new rifle was designated as ADS (АДС - Автомат Двухсредный Специальный - Avtomat Dual-medium, Special).They used the A-91M bullpup assault rifle as a starting point, retaining its bullpup layout, gas operated action with rotary bolt locking and forward ejection through the short tube running above and to the right of the barrel. Some parts of the weapon were necessarily redesigned and materials revised to work reliably when submerged in water; the gas system was modified with addition of the environment selector ("air / water"). Integral 40mm grenade launcher (which fires VOG-25 type 'caseless' grenades using additional front trigger inside the trigger guard) is fitted with removable barrel which can be removed when it is not needed by the mission profile. The muzzle of the barrel is threaded to accept muzzle brake / compensator, tactical silencer or blank-firing adapter. The rifle is fitted with adjustable iron sights, and an integral carrying handle is provided with Picatinny type rail on the top to accept various day and night optical sights. The ADS can fire any standard issue 5.45x39 ammunition (ball, tracer, AP) when above the water, with accuracy and effectiveness similar, if not better than of AK-74 / AK-74M general issue assault rifle. When submerged and loaded with 5.45 PSP ammunition, ADS outperforms APS underwater assault rifle in terms of accuracy and ease of handling.

The ADS is said to be under extensive field trials by undisclosed units of Russian Naval special forces. If adopted, it will replace APS underwater weapons and, possibly, some AK-74M general issue assault rifles in service with Russian Navy special operation units and other Russian special forces, which might be engaged in underwater operations (security, counter-terrorism in the sea, etc).

References