HO GP7R Locomotive ROCK #4506 (ATHG-1344)

HO GP7R Locomotive, Rock Island #4506, is a highly detailed HO-scale model of an EMD GP7R rebuilt switcher, captured in Rock Island livery for realistic operation on standard layouts. It supports both DC and DCC operation, and sound-equipped versions feature onboard DCC decoders with SoundTraxx Tsunami2 and dual speakers for authentic locomotive sound. The model includes a see-through cab with a full interior, fine-scale Celcon handrails, etched radiator and fan grilles, a heavy die-cast frame for traction, and body-mounted McHenry scale knuckle couplers (Kadee-compatible) with RP25-contoured wheels for smooth performance on popular HO tracks.

Rock Island-specific details emphasize prototype accuracy, including non-dynamic roof-hatch variants, early Pyle headlights, a Nathan P5 horn, firecracker antenna, and pipe-style handrails. Under the shell, a Genesis driveline with a 5-pole skew-wound motor, precision flywheels, and a multi-link drivetrain delivers strong pulling power and quiet operation, supported by all-wheel drive and reliable electrical pickup. It runs on minimum 18-inch radius curves (22-inch recommended) and uses Quick Plug plug-and-play electronics with a 21-pin NEM connector for easy DCC installation, with NMRA-compatible functions in DCC mode and CV-based customization. Road-number and paint schemes are drawn from prototype resources, making this Rock Island GP7R a faithful centerpiece for any HO railroad layout.