5KU Aluminium CNC Frame for Shadow 2 KJW / ASG Silver

The 5KU Aluminium CNC Frame for Shadow 2 KJW / ASG Silver is a lightweight, CNC-machined aluminium frame for the ASG / KJ Works CZ Shadow 2 GBB series. The frame has been developed as a replacement and custom part designed to reduce the relatively heavy feel of the Shadow 2 without switching to a plastic construction.

This Silver version combines an anodised aluminium surface with engraved markings, making it a striking base for a custom Shadow 2. The silver-coloured finish clearly highlights the CNC-machined character, and the frame can be combined with both black components and other silver-coloured aftermarket parts.

Lightweight CNC-machined aluminium construction

The frame is made entirely from CNC-machined aluminium. This enables 5KU to produce a precision-formed metal structure that is lighter than the heavier original frame for which this upgrade is designed.

Weight savings in the frame may be noticeable in the replica’s overall balance. How the Shadow 2 ultimately feels will, of course, depend on the complete configuration, including the slide, outer barrel, magazine, grips and any mounted optics.

Aluminium offers a good combination of strength and relatively low weight, but should not be regarded as indestructible. Threaded parts, mounting points and frame rails, in particular, require careful handling during assembly.

The anodised surface treatment helps to make the aluminium more resistant to normal wear and tear. However, the finish is not entirely scratch-proof; areas in contact with the slide, controls and a holster may show visible signs of wear after intensive use.

Voor ASG / KJ Works CZ Shadow 2

The 5KU GBSD2026SV has been developed primarily for the ASG and KJ Works CZ Shadow 2 GBB series. It is a genuine replacement frame, not a cosmetic cover that is fitted over the existing frame.

Before assembly, various internal components must therefore be removed from the existing lower frame and fitted into the new CNC-machined frame. The trigger, hammer, safety and other control mechanisms must be transferred correctly and checked again.

The product information also mentions the TS2 in relation to the lightweight frame construction. However, direct compatibility is less clearly documented than with the Shadow 2. For a TS2, we therefore recommend checking the exact model and the internal configuration used before purchasing.

5KU also points out that assembly may require some technical knowledge. With aftermarket frames, tolerances between individual replicas and internal components may mean that minor adjustments are necessary.

Practical insights

A frame upgrade has a significantly greater impact on the overall construction of a GBB pistol than, for example, replacing a trigger or magazine release. When fitting the parts, it is therefore advisable to work systematically and not to fit all the parts at once.

First, check that the internal components can be fitted correctly into the frame. Next, check the trigger, hammer, safeties and magazine release individually. Then fit the slide and check that it moves smoothly along the frame rails without any unnecessary resistance.

Never use screws to force poorly fitting parts into place. Aluminium threads, in particular, can be damaged if fasteners are tightened too hard or at an angle. With aluminium, “one more quarter-turn just to be on the safe side” isn’t always the maintenance advice you’d hope for.

The Silver version is also particularly well-suited to two-tone builds. Please bear in mind, however, that silver-coloured or natural aluminium parts from different manufacturers may vary in shade and surface finish.

Who is the 5KU Aluminium CNC Frame Silver suitable for?

The 5KU Aluminium CNC Frame for Shadow 2 Silver is particularly suitable for owners of an ASG or KJ Works CZ Shadow 2 who wish to reduce the weight of their replica or put together a complete custom build based on a CNC-machined aluminium lower frame.

The silver-coloured version complements competition- and race gun-inspired set-ups well and can be used to create a striking contrast with a black slide, or combined with other Silver CNC components.

As the lower frame needs to be largely dismantled for installation, this part is particularly suitable for experienced users and airsoft technicians. If you lack sufficient experience, professional fitting is recommended.

Specificaties

• Note: 5KU
• Producttype: CNC frame / lower frame
• Platform: CZ Shadow 2
• System: GBB
• Primary compatibility: ASG CZ Shadow 2
• Primary compatibility: KJ Works CZ Shadow 2
• TS2: As stated in the product information; check exact compatibility in advance
• Material: CNC-machined aluminium
• Colour: Silver
• Finish: Anodised
• Markings: Engraved
• Length: Approximately 235 mm
• Weight: Approximately 190 g according to the specialist product listing
• Doel: Gewichtsreductie / replacement / custom build
• Technical installation knowledge recommended: Yes
• Fitting may be necessary: Yes

Contents of the pack

• 1x 5KU Aluminium CNC Frame for Shadow 2 Silver
• Internal lower-frame components only if specifically included in the packaging

Common mistakes

• Do not assume universal compatibility with every CZ-type GBB.
• Please regard the confirmed compatibility primarily as ASG / KJ Works Shadow 2.
• Check each TS2 individually before assuming full compatibility.
• Do not expect a complete lower assembly including all internal parts.
• Do not dismantle the original frame unless you have sufficient knowledge of the trigger and hammer mechanism.
• Do not force internal components if the mounting points are not correctly aligned.
• After assembly, always check the trigger, hammer, magazine release and safeties.
• Check that the slide moves freely along the frame rails.
• Do not overtighten screws in aluminium.
• Don’t expect the anodised Silver finish to remain completely scratch-free.
• Please bear in mind that there may be slight differences in colour between silver-coloured aftermarket parts.
• Don’t expect the lighter frame to result in an immediate improvement in FPS or accuracy.

Frequently Asked Questions

Which replica is this 5KU frame intended for?
The frame was primarily developed for the ASG / KJ Works CZ Shadow 2 GBB series.

What material is the frame made of?
The frame is made from CNC-machined aluminium.

What finish does this model have?
The Silver version has a silver anodised finish.

Does the frame have engraved markings?
Yes. The product information states that it has engraved markings in keeping with the Shadow 2 style.

How much does the frame weigh?
A specialist product listing states a weight of approximately 190 grams.

How long is the frame?
The specified length is approximately 235 mm.

Why use an aluminium frame?
The main advantage is reduced weight, whilst retaining a fully metal frame construction.

Is the frame suitable for the KJ Works Shadow 2?
Yes. Compatibility with the KJ Works Shadow 2 is explicitly stated.

Is the frame suitable for the ASG Shadow 2?
Yes. The ASG CZ Shadow 2 is also explicitly listed as compatible.

Will this frame fit a TS2?
The TS2 is mentioned in the product information, but the direct fitment is less clearly documented than for the Shadow 2. You should therefore check the exact TS2 model and configuration in advance.

Are all internal components included?
You should not assume this to be the case. The product is supplied as a frame, and existing internal components must be transferred depending on the configuration.

Is the installation completely drop-in?
This cannot be guaranteed. With an aftermarket CNC frame, some minor fitting may be required.

Does the frame improve the FPS or accuracy?
Not directly. The upgrade is primarily aimed at weight reduction, construction and appearance.

The 5KU Aluminium CNC Frame for Shadow 2 KJW / ASG Silver combines a lightweight CNC construction with a silver-coloured anodised finish and engraved details to create a high-quality custom Shadow 2 GBB.