APS - AUG A1 Military Model AEG with Adjustable Scope (KU902) Pistol the main spring can be

the main spring can be easily taken out from rear of the gear box

- Please note self-installation is required

Providing additional weapon control

Innovative Hop-Up Thumb Dial located inside the gun (can see after dissemble the slide)

Lightweight 10" Guardian Rail Transformation System

APS - AUG A1 Military Model AEG with Adjustable Scope (KU902) Pistol the main spring can beSpecification: Type: AEG Material: Polymer, Metal Alloy Fire Mode: Semi Auto, Full Auto Hop up: Adjustable Length: 800 mm Barrel Length: 470 mm Power Source: Battery (Mini Handguard) Barrel Thread Type & Diameter: Counter Clockwise 14mm Magazine Capacity: 300 Rounds Package includes: A. P. S. AUG A1 Military Model AEG with Adjustable Scope, 300 rounds Magazine, Full Instruction Manual (Chinese & English), Original Box & Packaging Feature: Innovative