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Ships within 48 hours · Estimated delivery Aug 31 - Sep 5
20g BBs (results vary per build)
Compatibility: M4 / AR15 AEG and ERG platforms
Confirm compatibility with your gearbox setup before purchase
1x JeffTron Adjustable Trigger – V3
Crafted from precision CNC-machined aluminum
RetroArms CNC Air Nozzle – 21mm Cylinder Heads 20g BBs (results vary perThe RetroArms CNC Air Nozzle 21mm is a high precision upgrade designed to improve air seal, feeding reliability, and overall consistency in your AEG build. Made from durable CNC machined aluminum, this nozzle features an internal O ring to maximize air pressure delivery between the cylinder head and hop up chamber. Perfect for custom setups or replacements, this 21mm nozzle is ideal for specific M4, MP5, or other platforms that require this exact
