Proven performance, excellent range, and superior accuracy: use a Prometheus Air Seal Hard Hop-Up Rubber in any build for an instant power boost. Pair it with heavy BBs for optimal performance. The hard hop-up rubber is especially recommended for AEGs with a power output above 1.5 joules.

The superior quality and tolerances of the Prometheus hop-up rubber ensure increased range, accuracy, and precision, while creating a perfect air seal with excellent resistance to oil and wear. The material also prevents misfeeds and can handle a wide variety of BB weights and types. Perfect for Tokyo Marui AEGs and available in two additional hardness levels: red (hard) and purple (soft).