The Bofors L/70 is a towed anti-aircraft gun of Swedish origin. It was developed in the late 1940's by Bofors as a successor for the earlier Bofors L/60 which was very successful during World War 2. Compared to the older L/60 the L/70 has a greater effective range and higher rate of fire, making it much more effective against fighter jets. The new L/70 gun has also been used in various naval mounts and serves as the main armament for the CV9040 mechanized infantry fighting vehicle.

The Bofors L/70 is similar in principle to the earlier L/60 but is much heavier and larger. The L/70 is based on a 4 wheel trailer with two outriggers and two jacks. The single 40mm L/70 autocannon is mounted on a turntable. Some models feature an APU and others are powered externally. The crew of two consists of a gunner on the left and a loader on the right. The guns are normally operated by radar, but for manual fire a SRS 5 sight is fitted. Several upgrade packages are offered to keep the guns up to date. One of them is the BOFI package which adds a radar system above the barrel.

The L/70 fires different 40mm rounds than the earlier L/60. The new rounds are slightly lighter and have a much higher velocity. The latest upgrades include the 3P proximity fuze ammunition. The rounds are loaded in 4 round clips, although most systems are fitted with a 26 round hopper. The cyclic rate of fire is 240 rpm and upgrade packages offer 300 rpm. The maximum effective range is 3 to 4 km.

The L/70 is mounted on a four wheel chassis and is usually towed by a 6x6 truck, which may also carry additional ammunition and the crew. In case of emergency the L/70 may be fired from its wheels with much reduced effectiveness. The emplacement and displacement time are several minutes.

The L/70 was used by many Western nations and was widely exported to Asia, the Middle East, Africa and South America. The L/70 remains in widespread use although many systems have been replaced by surface to air missiles or are relegated to a secondary role.