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AirsoftPro ZERO upgrade set for TM AWS and WELL MB44xx includes a hybrid piston, stainless steel spring guide with bearing and 9mm upgrade spring for increasing the performance of Tokyo Marui AWS L96 and WELL MB44xx airsoft sniper rifles. The set is designed for use with the AirsoftPro AWS ZERO Gen. 4 trigger unit and provides a reliable foundation for a high-performance rifle upgrade.

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ASPRO418
AirsoftPro TM AWS ZERO Gen. 4 Upgrade Trigger Unit is a CNC-machined trigger unit with a ZERO (90°) piston sear designed for high-performance upgrades of TM AWS (L96), WELL MB44xx, CYMA CM.703, and CM.707 sniper rifles. Compared to the previous generation, it features a completely redesigned construction, an adjustable trigger, an integrated steel spring...
The upgrade set contains a lightweight CNC hybrid piston, stainless steel spring guide with ball bearing and a special 9mm spring designed specifically for the AWS system. Thanks to durable materials, reliable sealing and precise manufacturing, it offers increased service life and more consistent performance when using stronger springs. The set is compatible with original and reinforced AirsoftPro cylinders, but requires the use of the AirsoftPro AWS ZERO Gen. 4 trigger unit for proper operation.
The set contains a hybrid piston, stainless steel spring guide with bearing and 9mm upgrade spring for increasing the performance of the sniper rifle.
The 6061-T6 aluminum body is complemented by a stainless steel piston sear, POM sliding ring and counter-pressure piston head with O-ring for effective sealing.
The spring guide with ball bearing reduces spring twisting during compression and supports smoother operation of the unit.
The shortened spring is designed specifically for the AWS system and is available in M140 to M160 variants depending on the selected version.
The piston uses a 90° sear, making it compatible exclusively with the AirsoftPro AWS ZERO Gen. 4 trigger unit and unsuitable for use with the original trigger unit.
| Color | Red |
| Body/receiver material | Metal |
| Spring guide | Metal |