Field‑Proven Systems
Turret drive and door‑assist systems deployed on U.S. and allied platforms.
Field‑Proven Motion Control for Defense Platforms.
NPC’s turret drive and electro‑hydraulic door assist systems are deployed on U.S. and allied tactical wheeled and tracked vehicles. These are not concepts. They are field‑proven systems designed for demanding operational environments.
Systems Engineered for Mission-Critical Performance

Military Turret Drive System
Motorized Turret Drive Systems for OGPK Applications
Rugged, motorized turret drive systems designed for OGPK applications, with increased power and a robust gearbox for heavier turrets, variable-speed rotation up to 8 RPM, and an integrated true gear interface with manual backup drive for loss-of-power scenarios. A quick-disconnect mounting system supports rapid replacement in the field.
Why NPC for Turret Drive
Sole-source provider of motorized OGPK turret drive systems on U.S. tactical wheeled and tracked vehicles since 2004, with over 100,000 turret systems fielded across more than 14 vehicle platforms and a record of no properly installed component ever returned as a field failure.
See It in Action
Watch the turret drive system deliver smooth, controlled traverse for OGPK turrets in operational conditions.

Electro-HyDraulic Door Assist Systems
Complete Electro-hydraulic Door Assist Systems for Up-Armored Doors
Complete, self-contained electro-hydraulic door assist systems for up-armored doors up to 2,200 lbs on tactical wheeled vehicles, designed to open heavy doors to operational angles, even on side slopes, with controlled, repeatable motion. The low-profile package integrates motor, pump, cylinder, controls, and reservoir, with programmable positions, emergency bypass, and a thin profile for easier installation.
Why NPC for Door Assist
Complete, customizable electro-hydraulic door assist systems on three up-armored vehicle platforms, with a fourth pending approval, each blast-tested to military standards and delivered as a full solution rather than bare-bones components.
See It in Action
See NPC’s electro-hydraulic door assist system manage a heavy, up-armored door with controlled opening and closing under demanding load scenarios.
Proven on Operational Defense Platforms
OGPK Family of Turrets
OGPK Turret Drive Systems on U.S. and Allied Vehicles
NPC’s motorized turret drive systems power the OGPK family of turrets on operational defense platforms:
- U.S. tactical wheeled and tracked vehicles
- Allied platforms across 22 coalition partners
- OGPK applications requiring reliable, controlled motion in demanding conditions
Door-Assist — Deployed Systems
Door-Assist Systems on Up-Armored Tactical Vehicles
NPC’s electro-hydraulic door assist systems are integrated on multiple up-armored tactical wheeled vehicles:
- Caiman MRAP
- M915A up-armored semi-cab
- M917A3 HDT up-armored dump truck
- Common Tactical Truck (CTT), in development
These integrations are engineered to specific vehicle geometry and door loads to provide consistent, controlled operation for crews in demanding defense environments.
Explore Platform Integration with NPC
NPC systems are integrated on a range of U.S. and allied tactical wheeled and tracked vehicles. Our engineering team works with primes and agencies to match turret drive and door assist performance to platform geometry, load cases, and environmental requirements.