VSR-10 90° Aluminium Piston – Action Army

Action Army replacement piston for the Tokyo Marui VSR-10, made from aluminium and designed for 90° trigger groups. It replaces the stock piston with a light, sturdier component, intended for players upgrading the trigger of their bolt-action rifle who want a solid, repeatable sear engagement.

Features and technical specifications

• Manufacturer: Action Army
• Manufacturer code: B01-015
• Type: piston for 90° trigger groups
• Material: aluminium
• Weight: 30 g
• Compatibility: Tokyo Marui VSR-10 with a 90° trigger group
• Made in Taiwan

How it works

The 90° figure refers to the geometry of the engagement between piston and sear: with a 90° trigger the piston is held more positively than with the standard 45° system, giving a cleaner trigger break and a more secure hold with demanding springs. The piston must therefore be paired with a 90° trigger group and does not fit the stock 45° trigger.

Installation

It is a direct replacement in the VSR-10 cylinder: once a 90° trigger is fitted, it takes the place of the stock piston without modification. It is worth using the job to check the piston head seal, the cylinder head and the lubrication.

In the field

It is the natural complement to a full bolt-action upgrade: a more reliable sear engagement shot after shot and less moving mass, useful for players running the VSR-10 as a precision rifle in woodland games and MilSim events.