5KU Slide and Frame Kit LimCat for Hi-Capa 4.3 Tokyo Marui Grey

The 5KU Slide and Frame Kit LimCat for Hi-Capa 4.3 Tokyo Marui Grey is a comprehensive CNC-machined aluminium upgrade kit for the Tokyo Marui Hi-Capa 4.3 GBB platform. The set combines a compact 4.3-inch slide with a matching frame/chassis and various internal components for building a custom Hi-Capa.

This Grey version features an anodised finish and boasts the distinctive LimCat Custom-inspired design with a ported slide and CNC cut-outs. The kit also includes a lightweight aluminium nozzle housing, recoil spring guide and various parts of the hammer mechanism. A suitable 4.3-inch outer barrel is not included.

CNC-aluminium 4.3-inch LimCat constructie

The slide and the frame/chassis are made from CNC-machined aluminium. The precision-machined contours and cut-outs give the kit its distinctive competition and race gun look.

The slide is designed in the compact 4.3-inch format and features various openings and cut-outs. This removes material from the moving slide, which, in a well-tuned Hi-Capa, can contribute to fast and responsive cycling.

The included lightweight aluminium nozzle housing is based on the same principle: minimising moving mass wherever possible. However, the final result always depends on the overall combination of the nozzle, recoil spring, blowback components, magazine, gas and temperature.

The grey anodised finish provides a versatile base for a custom build. Grey can be combined in a relatively neutral way with black or silver, but also works well as a contrast with, for example, gold, red or purple.

Comprehensive kit for the Tokyo Marui Hi-Capa 4.3

The 5KU GB-602-GY is designed for the Tokyo Marui Hi-Capa 4.3 GBB platform. In addition to the slide and frame, the set includes various parts required to complete the assembly of the replica.

The kit includes, amongst other things, a recoil spring guide, a CNC-machined hammer assembly, a stainless steel sear and the corresponding internal hammer/valve components and pins.

With regard to the outer barrel, 5KU states that it is compatible with 5KU 4.3-inch outer barrels. This outer barrel is not included and must be taken from a suitable existing configuration or purchased separately.

The kit should not be regarded as a fully assembled Hi-Capa. Depending on the base replica and the desired configuration, additional original or aftermarket parts may need to be fitted.

Installation and correct adjustment

5KU states that fitting this kit may require technical expertise. This is important in the case of a slide and frame kit, as several components directly affect the mechanical operation of the GBB.

During assembly, check that the slide moves smoothly over the frame without excessive resistance, that the nozzle can retract fully, and that the outer barrel has sufficient room to move. The hammer, sear, trigger mechanism and safeties must also function correctly together after assembly.

Even parts developed for the same Tokyo Marui platform may not be fully drop-in compatible in every aftermarket combination. Minor differences in tolerances between different manufacturers may require fitting or adjustment.

Therefore, do not force parts together if they do not fit correctly. Carefully checking where resistance occurs is far wiser than hoping that two CNC-machined parts will ‘become friends’ of their own accord once enough force has been applied.

Practical insights

The compact 4.3 format makes this kit particularly appealing for competition, CQB and speedsoft-inspired Hi-Capa builds. Compared to a 5.1 configuration, the upper receiver is shorter, which gives it a distinctly different balance and appearance.

The use of a lightweight slide assembly and an aluminium nozzle housing can support a fast GBB cycle, but does not guarantee a specific cyclic rate or gas efficiency. The entire internal setup must be properly calibrated.

After assembly, first check the mechanical operation without BBs. Ensure that the slide and nozzle move freely, that the hammer resets correctly and that the safeties are functioning properly. The GBB cycle can then be tested and further adjusted.

Who is the 5KU LimCat 4.3 Grey Kit suitable for?

The 5KU Slide and Frame Kit LimCat 4.3 Grey is particularly suitable for experienced Hi-Capa users, airsoft technicians and players who wish to convert their Tokyo Marui Hi-Capa 4.3 into a fully customised replica.

The combination of CNC-machined aluminium, the compact 4.3 format and the LimCat Custom-inspired design is well suited to competition, speedsoft and racegun builds.

For users with no experience of dismantling, fitting and completely reassembling a Hi-Capa GBB, it is advisable to have it assembled by an experienced airsoft technician.

Specificaties

• Note: 5KU
• Model / stijl: LimCat Custom
• Producttype: Slide and Frame Kit
• Platform: Hi-Capa
• System: GBB
• Compatibiliteit: Tokyo Marui Hi-Capa 4.3
• Slide size: 4.3 inches
• Material: CNC-machined aluminium
• Colour: Grey / Gray
• Finish: Anodised
• Slide design: Ported / CNC cut-outs
• Nozzle housing: Lightweight aluminium
• Nozzle housing included: Yes
• Recoil spring guide inbegrepen: Ja
• Hammer assembly included: Yes
• Hammer assembly: CNC-gefreesd
• Stainless steel sear inbegrepen: Ja
• Internal hammer/valve components: Included depending on the model
• Pins included: Yes
• Compatibele outer barrel: 5KU 4.3-inch outer barrel
• Outer barrel included: No
• Total length: Approximately 182 mm
• Technical installation knowledge recommended: Yes
• Toepassing: Custom Hi-Capa / competition- / speedsoft- / racegun-build

Contents of the pack

• 1x 5KU LimCat Custom 4.3 CNC Aluminium Slide
• 1x 5KU LimCat Custom Frame / Chassis
• 1x Lightweight aluminium nozzle housing
• 1x Recoil Spring Guide
• 1x CNC-machined Hammer Assembly
• 1x Stainless Steel Sear
• Internal hammer/valve component, depending on the version
• Pins / fasteners
• Outer barrel not included

Common mistakes

• Do not confuse this 4.3 kit with the longer LimCat 5.1 version.
• Please do not regard the kit as a fully assembled Hi-Capa.
• Please note that the 4.3-inch outer barrel is not included.
• Do not automatically assume that installation is entirely a ‘drop-in’ process.
• Do not force the slide if it is jammed against the frame.
• Before final assembly, check that the outer barrel and nozzle assembly fit correctly.
• Check that the slide and nozzle can move freely.
• Carefully test the hammer, trigger and safeties after assembly.
• Do not expect the lightweight construction to automatically result in better fuel efficiency or a higher cyclic rate.
• Bear in mind the tolerances when combining parts from different aftermarket manufacturers.
• Do not confuse Grey with any separate two-tone colour variants.
• If you do not have sufficient experience with Hi-Capa GBB technology, have the installation carried out by an experienced airsoft technician.

Frequently Asked Questions

Which Hi-Capa is this 5KU LimCat Kit designed for?
This version has been developed for the Tokyo Marui Hi-Capa 4.3 GBB.

What material are the slide and the frame made of?
The main components are made from CNC-machined aluminium.

What finish does this version have?
The Grey version has an anodised grey finish.

How big is the screen?
It is a 4.3-inch model.

Does the slide have cut-outs?
Yes. The slide has a ported design with CNC-machined cut-outs to reduce material and moving mass.

Is the nozzle housing included?
Yes. The kit includes a lightweight aluminium nozzle housing.

Is a hammer assembly included?
Yes. A CNC-milled hammer assembly is included in the set.

Is a stainless steel sear included?
Yes. The kit contains a stainless steel sear.

Is an outer barrel included?
No. The outer barrel is not included.

Which outer barrel is intended for this kit?
5KU specifically mentions compatibility with 5KU 4.3-inch outer barrels.

Is this kit suitable for a Hi-Capa 5.1?
This version is primarily intended for the Hi-Capa 4.3 configuration. For a 5.1 build, we recommend using the dedicated 5.1 LimCat kit rather than assuming universal compatibility.

Is this a complete Hi-Capa?
No. It is a comprehensive upgrade and build kit. Additional parts are required to assemble a fully functional replica.

Is the installation a completely drop-in fit?
You shouldn’t assume that. Fitting and technical adjustment may be necessary.

Is professional assembly recommended?
If you have little experience of completely dismantling and reassembling a Hi-Capa GBB, it is advisable to have it assembled by an experienced airsoft technician.

The 5KU Slide and Frame Kit LimCat for Hi-Capa 4.3 Tokyo Marui Grey combines a compact CNC-machined aluminium construction with a lightweight nozzle housing and extensive internal components to create a high-quality custom Hi-Capa 4.3.