Steyr STM 556

Overview

STM 556
General Information
Type	Assault Rifle
Place of Origin	Austria
Designer Companies	Steyr
Period Designed	2010s
Period Produced	2012 (?) - Present
Characteristics
Cartridge	5.56x45mm
RoF, Cyclic	700~900rpm
Expected Muzzle Velocity	856m/s (DM 11)
Action	Gas-operated, short stroke gas piston, rotating bolt
Firemodes	Safe, semi, full
Feed System	Detachable box magazine
Ammunition Loading	5.56x45mm STANAG magazines: • USGI M16 Mag.: 20-rnd • USGI M16 Mag.: 30-rnd • (More)
Effective Range	503m
Maximum Range	2,700m
Dimensions
Weight	3.4kg (unloaded)
Barrel Length	293mm or longer
Length	730mm (collapsed stock, 293mm barrel) 830mm (extended stock, 293mm barrel)
Height	184mm
Width	63mm
Components
Hammer & Trigger	Single-stage, 2.49kg pull
Rifling	6 grooves, right hand
Grips	Magpul MOE or MOE SL
Muzzle Device	Flash hider
Stock
Stock Type	Collapsible Magpul CTR Carbine Stock - Mil-Spec
Universal Attachments
Rail Type	MIL-STD-1913 Picatinny Rail

The Steyr STM 556 is an Austrian assault rifle developed in the 2010s.

Steyr Products
Firearms
Assault Rifles	ACR • AUG (A1 • A2 • A3 • StG 58 • StG 77 • STM 556
Bolt-Action Rifles	Mannlicher–Schönauer • Mannlicher M1886 (/88) • Mannlicher M1888 (/90) • Mannlicher M1890 Rifle • Mannlicher M1890 Carbine (Cavalry • Gendarmerie • Stutzen) • Mannlicher M1893 (Carbine) • Mannlicher M1895 (Carbine • Carbine w/ Stutzen Lug • Carbine-Stutzen • Sniper • Stutzen • Stutzen-Carbine)
Machine Guns	MG 74
Sniper Rifles	AMR 5075 • HS. 50 (M1) • IWS 2000 • Scout (Elite • RFR) • SSG 04 • SSG 08 • SSG 69
Submachine Guns	AUG 40 • SSP • MPi 69 • MPi 81 • TMP
Pistols	C (9-A1 • 40-A1) • GB • L (9-A1 • 40-A1) • M (9 • 9-A1 • 40 • 40-A1 • 357 • 357-A1) • M1894 • M1901 • M1907 • M1912 • S (9 • 9-A1 • 40 • 40-A1)
Grenade Launchers	GL 40

Austria Weapons Modern Period (1991 — Present)

Infantry Weapons
Melee Weapons	Bayonet	[[]]
	Survival Weapon	[[]]
Sidearms	Pistol	G17 (Gen1 • Gen2 • Gen3 • Gen4 • Gen5) • G18 • G19 • G20 • G21 • G22 • G23 • G24 • G25 • G26 • G27 • G28 • G29 • G30 • G31 • G32 • G33 • G34 • G35 • G36 • G37 • G38 • G39 • G40 • G41 • G42 • G43 • G44 • G45 • G46 • G47 • G48
	Revolver	[[]]
	Machine Pistol	[[]]
Close Quarters	Personal Defense Weapon	[[]]
	Submachine Gun	TMP
	Shotgun (automatic)	[[]]
	Shotgun (semi-automatic)	[[]]
	Shotgun (manual-action)	[[]]
Primary Weapons	Assault Rifle (5.45/5.56)	ACR • AUG (A1 • A2 • A3) • STM 556
	Assault Rifle (7.62)	[[]]
	Assault Rifle (other)	[[]]
	Carbine (5.45/5.56)	[[]]
	Carbine (7.62)	[[]]
	Carbine (other)	[[]]
Automatic Support Weapons	Light Machine Gun	[[]]
	General Purpose Machine Gun	[[]]
	Heavy Machine Gun	[[]]
Long Range	Anti-Materiel Rifle	[[]]
	Bolt-Action Rifle	[[]]
	Designated Marksman Rifle	[[]]
Launchers	Grenade Launcher (Attachment)	[[]]
	Grenade Launcher (Standalone)	[[]]
	Disposable Rocket Launcher	[[]]
	Rocket Launcher	[[]]
	Guided, Anti-Tank	[[]]
	Guided, Anti-Air	[[]]
Non-Lethal Weapons	Rifle	[[]]
	Pistol	[[]]
Underwater Weapons	Sidearm	[[]]
	Rifle	[[]]
Explosives	Anti-Personnel Mines	[[]]
	Anti-Tank Mines	[[]]
	Offensive Grenades	[[]]
	Smoke Grenades	[[]]

Firearm Accessories
Optics	Iron Sights	[[]]
	Collimator	[[]]
	Telescopic	[[]]
	Magnifier	[[]]
Attachments	Flashlights & Lasers	[[]]
	Foregrips & Bipods	[[]]

Infantry Equipment
Clothing	Backpacks	[[]]
	Body Armour	[[]]
	Bomb Suit	[[]]
	Elbow and knee pads	[[]]
	Signals & IFF	[[]]
	Suits	[[]]
	Vests & Webbing	[[]]
Headwear	Communication	[[]]
	Gas Masks & Rebreathers	[[]]
	Goggles	[[]]
	Helmets	[[]]
	Vehicle Headwear	[[]]
Optics, Detection and Surveillance	Man-Portable Radar	[[]]
	Mine Detectors	[[]]
	Night Vision Goggles	[[]]
	Periscopes	[[]]
	Rangefinders	[[]]
	Surveillance	[[]]

Artillery
Anti-Aircraft Guns	[[]]
Anti-Tank Guns	[[]]
Anti-Tank Guided Missiles	[[]]
Anti-Tank Guided Missile Systems	[[]]
Anti-Tank Guided Missile Systems	[[]]
Howitzers	[[]]
Mortars	[[]]
Railroad Artillery	[[]]
Recoilless Guns	[[]]
Rocket Artillery	[[]]
Siege Artillery	[[]]

Land Vehicle Weapons
Vehicle Machine Guns	[[]]
57mm Tank Guns	[[]]
73mm Tank Guns	[[]]
76.2mm Tank Guns	[[]]
85mm Tank Guns	[[]]
100mm Tank Guns	[[]]
115mm Tank Guns	[[]]
120mm Tank Guns	[[]]
122mm Tank Guns	[[]]
125mm Tank Guns	[[]]
130mm Tank Guns	[[]]
152.4mm Tank Guns	[[]]
Heavy Guns	[[]]
Vehicle Autocannon	[[]]

Aircraft Weapons & Munitions
7.62mm Machine Guns	[[]]
12.7mm Machine Guns	[[]]
23mm Cannons	[[]]
30mm Cannons	[[]]
37mm Cannons	[[]]
Rocket Pods	[[]]
Rockets	[[]]
Air-to-Air Missiles	[[]]
Air-to-Ship Missiles	[[]]
Air-to-Surface Missiles	[[]]
Anti-Radiation Missiles	[[]]
Cruise Missiles	[[]]
Bombs	[[]]