Bullets supply cam/delayer
The purpose of the delayer is to keep HopUp chamber open for a longer time. It is mounted on the piston gear. It fit without gluing or fasten. Just press it between pin and axle. This small device could solve your problems with the bullets feeding. For exmaple on HROF guns. Made of nylon
SHS Airsoft is one of the leading airsoft suppliers from Hong Kong, selling a large variety of AEG upgrade parts. It‘s very well known for their well-priced upgrade parts, such as their motors, gearboxes, gear sets, cylinders, barrels and hop-ups.
SHS also includes the Super Shooter brand (premium SHS parts) and PPS (accessories and parts for gas and sniper rifles).