VSR ZERO complete upgrade trigger set - Gen. 6

PACKAGE CONTENTS:

• ZERO Trigger Gen.6 (18036)
  The latest generation CNC-machined trigger mechanism featuring a 90° piston sear. Includes the new Sear Engagement Adjustment feature, an inspection window for visual verification, a trigger adjustable within a 7 mm range, a safety lever, and mounting screws.
• Lightweight ZERO Hybrid Piston (6720)
  Features an ultra-lightweight aluminum body, two polyacetal (POM) guide rings for smooth operation inside the cylinder, and a stainless steel piston catch.
• Stainless Steel Spring Guide with Thrust Bearing (6724)
  Equipped with a high-quality ball bearing to reduce friction and prevent spring twisting during compression.
• 9mm Upgrade Spring of Your Choice
  Manufactured from high-quality spring steel with proper heat treatment and ground ends. The surface is protected by black oxide coating. Available spring strengths range from M120 to M170.

SEAR ENGAGEMENT ADJUSTMENT

The sixth generation ZERO Trigger allows adjustment of the engagement depth between the piston sear and the trigger mechanism. By turning the adjustment screw, the overlap of the engagement surfaces can be changed, directly affecting the trigger characteristics.

• SAFE – larger sear overlap providing the highest safety margin.
• SPORT – balanced setting offering a compromise between safety and a shorter trigger pull.
• RISK – minimal sear overlap. Provides the shortest trigger pull but significantly reduces the safety margin of the mechanism.

Unlike most conventional trigger units, the engagement setting can be visually inspected without disassembling the mechanism through the inspection window located on the top side of the housing.

Warning: Make adjustments only in small increments and thoroughly verify safe operation after every adjustment. Excessively small sear engagement may result in unintended piston release caused by impact, vibration, or forceful bolt closure.

FEATURES AND SPECIFICATIONS:

• The trigger housing and piston body are CNC-machined from lightweight yet durable 6061-T6 aluminum alloy.
• Aluminum components feature a high-quality matte anodized finish.
• The piston sear, lever, and spring guide support are manufactured from steel and heat-treated to a hardness of HRC 28–32.
• The trigger incorporates a ball bearing for a smoother trigger pull.
• Horizontally adjustable trigger with an adjustment range of up to 7 mm.
• New adjustable sear engagement for individual trigger tuning.
• Inspection window allowing visual verification of the engagement setting.
• Internal pins are manufactured from stainless steel.
• A pair of double-torsion springs reliably returns the sear to its default position.
• The trigger mechanism consists of 29 individual components.
• A safety lever is included in the package.
• Tested with springs up to M170.
• Easy installation within minutes.
• Replacement parts available directly from AirsoftPro upon request.
• Each unit is marked with a unique serial number.
• Designed and assembled in the Czech Republic. Selected technical solutions are legally protected.

COMPATIBILITY:

Compatible with:

• Tokyo Marui VSR-10
• JG BAR-10 (Latest production models may use M4 mounting screws instead of M3. Minor modification may be required.)
• Well MB02, MB03, MB07, MB09, MB10, MB11 and other VSR-10 based models
• CYMA CM.701
• CYMA CM.708
• CYMA CM.700 (Safety lever is not compatible.)

The set can be used with both original cylinders and reinforced AirsoftPro upgrade components.

Not compatible with MA4401, MA4402, Marui AWS series and similar systems. Also not suitable for M24 rifles.

WHY CHOOSE THE ZERO UPGRADE SET?

A durable and reliable trigger mechanism is one of the key requirements for a successful sniper rifle upgrade. Standard trigger units are usually sufficient for stock springs, but the risk of failure increases significantly when stronger springs are installed.

Rifles based on the Marui VSR system utilize a 45° piston sear design. During cocking, the piston is forced upward and tends to tilt inside the cylinder. This results in increased wear, rougher operation, and in extreme cases may even lead to unintended piston release.

The ZERO Upgrade Set utilizes a true 90° piston sear design. The piston remains properly aligned during cocking, does not tilt inside the cylinder, and the engagement surfaces are significantly more resistant to heavy loads. This makes the entire system suitable even for powerful upgrade builds using strong springs.

All components in the set have been designed as a fully compatible system and together form one of the most durable upgrade solutions available for the VSR-10 platform.