Platt MR550 Shielded Ring Mount System

The Platt MR550 Shielded Ring Mount fitted with the M134D Minigun combines one of the most widely adopted manned weapon stations with the world’s most devastating close-range fire support weapon system.

Initially developed for special operations units of the Finnish Army, the MR550 Turret is a fully integrated weapon station package which supports the M134D Minigun, power supply, ammunition and ammunition feed systems.

Protection for the gunner from blast and kinetic threats is provided by side and front shields, with the ability to traverse 360° and elevate/depress to engage targets in a variety of terrain and complex environments.

Baseline armor protection is STANAG 4569 Level 1 with protection packages available up to STANAG 4569 Level 3. Lightweight, low profile and with the choice of manual or powered operation via Platt’s fully integrated electric drive (eDrive), the MR550 with Minigun is a cost-effective alternative to remote weapon systems for light and medium weight armored vehicles.


  • Powered by self-contained 24VDC battery pack
  • Optional solar charging of batteries
  • System Control Module (SCM) to manage eDrive power supply
  • Minimal electrical burden on vehicle (24VDC, 5A charging)
  • Up to 2 hours continuous rotation on battery power alone
  • Joystick motion control with dead-man trigger and optional weapon firing
  • Weapon station rotation speed: 6–10 rpm
  • Rotation of weapon station on 30˚ inclines
  • Manual operation override for redundancy
  • Capable of retrofit to existing ring mounts


The Platt eDrive kit provides battery-powered traverse for ease of weapon station operation on sloped or uneven terrain and reduced operator fatigue.

Specifications (version dependent):

Overall Length: 61.69” (156.7 cm)

Overall Width: 49.17” (124.9 cm)

Overall Height: 37.99” (96.5 cm)

Weight: 551.16 lb (250 kg) at STANAG Level 1

Traverse: 360˚

Weapon Elevation/Depression: +60˚/-20˚

Ammunition Capacity: 3,000 rounds


The MR550 Shielded Ring Mount is currently fitted to the Brazilian M113, British Army/Royal Marine BvS10 Viking, British Army FV432 Bulldog, British Army Warthog, US Army/Marine Corps RG-31, Swedish and Finnish RG-32M, and Netherlands Marine Corps BvS10 Viking.