Repair & Refurbishment

Refurbishment and Repair Before and After Mounts • Telescopes • Quadrants • Aiming Circles • Alignment Devices • And More!

Seiler Instrument specializes in the inspection, repair, overhaul, and refurbishment of the optical fire control systems used on all existing United States howitzer systems as well as many howitzer systems formerly used by the United States.


  • M109 Series, 155mm Self-Propelled Howitzer
  • M777, 155mm Lightweight Towed Howitzer
  • M119, 105mm Lightweight Towed Howitzer
  • M198, 155mm Towed Howitzer
  • M110, 8″ (203mm) Self-Propelled Howitzer
  • M101, 105mm Howitzer
  • M102, 105mm Towed Howitzer
  • M108, 105mm Self-Propelled Howitzer
  • M114, 155mm Towed Howitzer
  • M115, 8″ (203mm) Self-Propelled Howitzer

Refurbished optical fire control equipment can extend the life of your weapon system at a fraction of the cost of replacement with new instruments.

Seiler Instrument guarantees that these instruments will look and function like-new and carry a like-new warranty.

Contact our Manufacturing Sales Department for more information!