Prometheus EG Hard Gear 26:1 Helical Gearset (Triple Torque 100:300) Smith & Wesson lower profile crane stock with M 16C lower profile crane stock with hinged buttplate better efficiency than any brushed motor available and still get super low operating temps just not quite at the level of the fully hand built CNC black version Prometheus EG Hard Gear 26:1 Helical Gearset (Triple Torque 100:300)●26:1 (100:300) Helical Gearset●Highly durable reinforced gearset●Precision machined●v2 v3Gearbox CompatibleThe new and improved Prometheus EG Hard Gear reinforced triple torque helical gears are designed for MS110 150 spring rates and built off the original Prometheus formula for a superior gearset Precision shot peening and machine cut dimensional accuracy of each gear make for a highly reliable set of gears