A well tuned hop-up is crucial for accuracy.
Airlab Air-Hop Installation Tool
Airlab M-nub/EM-nub Installation
HSA Barrel Lockdown Kit for AEGs
HSA CNC Barrel Cleaning Rod (Chemical Resistant)
HSA EM-nub
HSA IER-hop Z-kit
HSA IR-hop Z-Kit
HSA M-nub
HSA R-hop
HSA R-hop Z-Kit