Ulysses Recoil Kit for KWA ERG

Updated for 2023! Now includes a CQB and Field velocity spring! 

The Ulysses Recoil Kit is a complete drop-in upgrade for your KWA RM4 ERG - increasing your felt recoil over the factory unit while also providing adjustable FPS output similar to the KWA VPS guide as found on the non-recoil guns.

Fully constructed from machined steel for increased durability with a nylon bushing to help quiet the physical movement. Each section is affixed via large threaded shafts, creating a superior strength design compared to the brass KWA recoil weight which is held together with roll pins. 

This new updated version includes both a CQB and Field velocity spring and will cover all your Airsoft needs. 

The Ulysses can also be optionally installed without the rear spring, functioning as a "recoil delete" to eliminate the recoil function and operate as a traditional AEG. Conventional AEG springs can be used in this configuration.

A KWA Recoil Disassembly Tool can be helpful in removing the spring guide end cap assembly, and is available for purchase with the Ulysses or separately. 

Tech notes: 

Please note that barrel length and quality of compression can greatly impact FPS output on individual AEG's and further tuning may be required to obtain desired FPS. Testing of the Ulysses Recoil Kit has been done using a Lambda Five 6.05 diameter 303mm length bore with perfect compression provided from the Tier 1 Upgrade.

While not marked, the springs can be easily identified by their length: the Field spring is the longest, CQB is mid-length, and the end cap spring guide spring is the shortest. The end cap spring is used for both the Field and CQB springs. 

Tokyo Marui NGRS springs are also compatible with the Ulysses recoil kit. See testing notes below for approximate FPS values.