The SB-40 LAG is a 40 mm automatic grenade launcher developed and produced in Spain by the Empresa Nacional Santa Bárbara (EN SB) company (currently a part of the European Land Systems Group of General Dynamics).

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SB-40 LAG
A LAG 40 of the Spanish Navy Marines.
Type	Automatic grenade launcher
Place of origin	Spain
Production history
Designer	Empresa Nacional Santa Bárbara
Designed	1984
Manufacturer	Santa Bárbara Sistemas
Specifications
Mass	34 kg (75.0 lb)
Length	960 mm (37.8 in)
Barrel length	415 mm (16.3 in)
Width	200 mm (7.9 in)
Height	220 mm (8.7 in)
Cartridge	40x53mmSR
Caliber	40mm
Action	Recoil operated, roller locked
Rate of fire	215 rounds/min
Muzzle velocity	240 m/s (787 ft/s)
Effective firing range	Sights adjustable from 100 to 1500 m
Feed system	24 or 32-round ammunition belt
Sights	Leaf sight

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•  Brazil: Used by Brazilian Marine Corps (Mounted on Piranha IIIC).^[1]
•  Colombia: The Colombian Navy uses the SB-40 LAG grenade launcher installed on a turret on the ARC Juan Ricardo Oyola Vera riverine patrol boat.^{[citation needed]}
•  Philippines: Used by the Philippine National Police Special Action Force either on tripod or mounted on light utility vehicles, and by Philippine National Police Maritime Group mounted on patrol crafts
•  Portugal: used on M-11D scout cars (Panhard VBLs)^[2]
•  Spain: used by the Spanish Army (Ejército de Tierra de España), Spanish Navy Marines and Guardia Civil Española.

• Denel Y3 AGL - automatic grenade launcher used by South Africa.
• Heckler & Koch GMG - A 40 mm automatic grenade launcher used by the German Army and other European armed forces.
• XM174 grenade launcher, similar weapon
• AGS-17, similar weapon, but smaller 30 mm calibre
• Milkor MGL, another South African 40 mm grenade launcher
• Mk 19 grenade launcher, similar weapon
• XM307 (ACSW) (crew-served 25 mm autocannon)
• XM25 CDTE (25 mm airburst personal weapon)
• Comparison of automatic grenade launchers