Switzerland Rheinmetall
Oerlikon Millennium Gun
35mm naval close-in weapon system using a revolver cannon firing AHEAD airburst ammunition, designed for compact installation against anti-ship missiles and small craft.
Compiled from public sources ·primary reference ↗ ·last verified 2026-07-04
Procurement snapshot
Availability & export
National export licensing
Subject to Switzerland export-control approval; verify eligibility with the manufacturer.
Channel: Direct commercial / G2G
Fielded & proven
Operator data not public
Status: active.
Lifecycle cost (est.)
No public unit price to model from.
Interoperability
No standardised NATO calibre / datalink detected in public specs.
Derived guidance from public data, export regime by country of origin, lifecycle from the GAO ~30% acquisition rule. Verify eligibility, pricing and offsets with the manufacturer and your acquisition authority.
Full specifications
Performance
Speed, range, altitude and engagement capability.
- Rate of fire
Rounds per minute (cyclic). Higher increases suppression and hit probability.
- 1,000 rpm
Firepower
Armament, payload and guidance.
- Caliber
Bore diameter of the main gun or rifle. Larger throws heavier projectiles; not simply better, ammunition commonality matters.
- 35 mm
Physical
Dimensions, weight and crew.
- Combat weight
Fully loaded weight. Lighter eases transport and bridging limits; heavier often means more armor.
- 3,200 kg
Munition
Round type, penetration, velocity and projectile data.
- Caliber
Bore diameter the round is fired from.
- 35 mm
Specifications compiled from public Rheinmetall and reference sources ↗. Published defense figures are approximations, treat comparisons as directional. Last verified 2026-07-04.
Compare with rivals
See how it stacks up
KBP Instrument Design Bureau Pantsir-S1 
Diehl Defence IRIS-T SLM 
Rafael Advanced Defense Systems Iron Dome Frequently asked questions
How much does the Rheinmetall Oerlikon Millennium Gun weigh? +
The Rheinmetall Oerlikon Millennium Gun has a combat weight of 3,200 kg.
Similar systems
Rafael Advanced Defense Systems
C-Dome
Raytheon (RTX)
Phalanx CIWS (Mk 15)
Aselsan
GOKDENIZ CIWS
KBP Instrument Design Bureau