Ulysses Recoil Kit for KWA ERG
      Ulysses Recoil Kit for KWA ERG
      Ulysses Recoil Kit for KWA ERG
      Ulysses Recoil Kit for KWA ERG

      Ulysses Recoil Kit for KWA ERG

      $109.00
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      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. 

      Compatible Models

      • PTS RM4 Scout & CQB
      • PTS Centurion Arms CM4-10
      • KWA RM4A1
      • KWA Ronin Recon ML
      • KWA Ronin T10 & T10 SE
      • KWA Ronin TK.45
      • KWA SR10 (ERG model)
      • KWA RM4 Q10

      Specifications

      • Adjustable FPS output via 14mm wrench
      • Full steel construction
      • Includes CQB and Field velocity springs
      • Weight: 13.4oz (379.88 grams)
      • Dimensions: 8.66(L)x0.90(W)x0.90(H) inches
      • Made in South Korea

      Testing Notes w/303mm 6.05 bore

      • Ulysses Field spring at minimum / maximum extension: 370 - 430 FPS
      • Ulysses CQB spring at minimum / maximum extension:  300 - 330 FPS
      • Eagle6 M105 spring at minimum / maximum extension: 370 - 415 FPS
      • Eagle6 M110 spring at minimum / maximum extension: 385 - 430 FPS
      • Eagle6 M120 spring at minimum / maximum extension: 430 - 470 FPS
      • KWA CQB ERG spring at minimum / maximum extension: 500 - 530 FPS

      Specific References