Prometheus Flat Hop-up Bucking

DOES NOT COME WITH NUB

REQUIRES PROMETHEUS "FLAT" OR "HOP BRIDGE" TENSIONER NUB TO WORK

Features:
Smooth interior, no locating ridge or hop mound
Provides an longer, even, smooth contact surface against the BB
Ideal for use with Prometheus flat-hop nubs
Compatible with almost all Airsoft AEG barrels

Material: Silicone rubber