Prometheus EG Barrel Wide Mechbox Pro This HK 416 will send

This HK 416 will send BBs downrange at 420 FPS

Includes Micro Dot dust cover and batteries

turn on the Eyetrace unit and engage your target at night

Please be sure to loc tite the screw to keep your safeties tight

Detail in bracket (8mm) means diameter for bushings/bearings

Prometheus EG Barrel Wide Mechbox Pro This HK 416 will sendInner diameter 6. 030. 01mm with dimensional tolerance! Wide Expanded HOP window for a variety of HOP nubs and tensioners Introducing Prometheus EG Barrel W; Wide Expanded HOP window model, based on our EG barrel with the renewed Wide Expanded HOP window for a variety of HOP nubs and tensioners. Inner barrel bore width of 6. 03mm with a tolerance of 0. 01mm, made of stainless steel (SUS) for superior strength necessary to maintain accuracy without the