MDRX HPA Hop Up unit

Especially designed for the MDRX HPA.

A built-in feeder guides BBs directly toward the front face of the nozzle, ensuring extremely reliable feeding, perfect BB alignment, and complete elimination of double-feeds and misfeeds.

The HPA engine and hop-up chamber are designed to self-align with each other for maximum consistency.

This chamber accepts standard AEG-type hop-up rubbers, however Silverback strongly recommends using our Bolt Action type bucking (SRS/TAC41/VKS) for optimal air seal performance.

All MDRX HPA rifles are factory-equipped with a Silverback SRS 80° hop-up rubber. A harder bucking provides improved stability and consistency with this HPA architecture.

Polycarbonate hop-up unit for AEG hop-up rubbers,

TCD ring design, incremental “click” adjustments using 2 ball plungers, 36 positions ranging from 0 up to 750 µm with the low nub (standard bbs configuration), and from 500 up to 1250 µm with the high nub (heavy bbs configuration).