The Tune Up Kit made of Ergal for A&K M60 / MK43 from FPS is a complete internal performance upgrade set designed for heavy support AEG platforms, engineered to improve air seal efficiency, enhance compression stability, and deliver more consistent gearbox performance under sustained high-rate-of-fire use.

Manufactured by FPS Softair in Italy, this kit is built around a full replacement of the air compression system, focusing on reducing air loss and strengthening the most stressed pneumatic components inside the gearbox.

The kit typically includes a CNC-machined Ergal air nozzle with internal O-ring, a reinforced cylinder head, and a double O-ring piston head made from CNC Ergal aluminum. Together, these components form a complete compression upgrade that improves sealing across the entire air system and stabilizes FPS output during continuous fire.

The air nozzle is specifically designed for A&K M60 / MK43 gearbox systems, with a length of approximately 34.3 mm, ensuring correct alignment with the hop-up unit for reliable feeding and proper air seal timing.

By upgrading all key compression components at once, the kit eliminates common weak points found in stock setups, such as nozzle leakage, inconsistent piston sealing, and inefficient cylinder compression. This results in smoother cycling, improved efficiency, and more stable FPS output, especially important in long-duration support weapon builds.

Key Features

Tune Up Kit made of Ergal for A&K M60 / MK43 from FPS
Complete internal compression upgrade kit for M60 / MK43 AEG platforms
CNC Ergal air nozzle with internal O-ring for improved sealing
Reinforced cylinder head for better air compression stability
Double O-ring piston head for enhanced compression efficiency
Improves FPS consistency and air seal reliability
Designed for A&K M60 / MK43 support weapon gearboxes
Made in Italy with precision CNC machining
Optimized for high-stress, high-volume firing setups

A complete high-performance internal upgrade kit designed to improve air seal, durability, and consistency in A&K M60 / MK43 gearbox systems.