A&K Masada Hop Up Unit.

Features: 

• Not for Beta Project Made PTS ACR. Only for the A&K OEM.
• Package Includes: Complete Hopup Assembly, Hopup Bucking, Barrel Lock
• Compatibility: For PTS A&K ACR Series Airsoft AEG Rifles
• Factory direct OEM replacement part
  • Injection molded polycarbonate construction
  • Hopup bucking included