RPW.4 Viper
RPW.4M4 Viper
Type	Armoured car
National origin	Wingarde
Manufacturer	Maschinenfabrik Riegert & Söhne
Designed	1946-1947
Introduction	5 December 1948
Retired	1986–1999
Primary users	Wingarde Federal Army Lucretian Republican Army
Produced	1948–197X

The Riegert Viper, later redesignated RPW.4 Viper under the post-WW2 New Standard, was an armoured scout car which served with the Federal Army for almost 40 years. Fit for light reconnaissance, screening and liaison, the vehicle was initially open-topped, armed with a single pintle-mounted 7.92mm MG49.

The Viper received progressive armament upgrades over its service life: a turret to enclose its gunner and their MG49, which was later upgunned to a 13mm MG51, and eventually a major overhaul in the form of a redesigned turret to house a 20mm autocannon.

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