5KU 1913 Optic Mount for CYMA Handguard

The 5KU 1913 Optic Mount for CYMA Handguard is a compact, CNC-machined aluminium optic mount for the 5KU MMS handguard system on compatible CYMA and GHK AK airsoft replicas. The mount adds an M1913 / 20mm Picatinny rail above the receiver, allowing a red dot or other suitable sight to be fitted without relying on a traditional AK side mount.

The mount has been developed for MMS configurations of, amongst others, the AK74S, AK104, AK105 and AKM. It is important to note that this optic mount is not a universal AK mount: the replica must be fitted with a compatible 5KU/JMac-style MMS handguard. The mount therefore serves as an extension of the MMS system rather than a standalone mounting solution for any AK receiver.

M1913 Picatinny-montage boven de receiver

The optic mount creates an M1913 / 20mm Picatinny mounting position above the receiver. The rail has five slots, providing space for a compact red dot sight or another sighting device with a suitable Picatinny mounting base.

The position above the receiver allows for a modern optical setup without the need for a traditional AK side mount. This is particularly useful for compact red dots, as the sight can be positioned centrally above the replica whilst the MMS handguard system serves as the mounting base.

Designed specifically for the 5KU MMS handguard system

This mount has been designed as an accessory for the 5KU MMS AK Handguard System, based on the modular JMac concept. The optic mount is attached to the rear extension of the MMS handguard and, together with this handguard, forms a single mounting system.

This distinction is important when determining compatibility. Simply owning a CYMA or GHK AK74S, AK104, AK105 or AKM is not sufficient; the correct MMS handguard must also be present. This product is not intended for use with a standard AK handguard that lacks this mounting feature.

CNC-machined aluminium structure

5KU manufactures the optic mount from CNC-machined aluminium. This creates a sturdy mounting base without adding an unnecessary amount of extra material to the front of the replica.

A stable construction is important for an optic mount, as any movement between the rail and the sight affects the optic’s performance. You should therefore always check, after fitting, that both the MMS handguard and the optic mount itself are correctly secured and free from play.

Suitable for CYMA and GHK AK platforms

The mount is available for compatible CYMA and GHK AK platforms, including the AK74S, AK104, AK105 and AKM, provided they are fitted with the appropriate MMS handguard.

In this respect, the mount may be of interest for both AEG builds and compatible GBB set-ups. However, the exact fit is determined by the MMS system used, and not solely by the AK model stated on the replica’s box.

Not the same as the Tokyo Marui AKM version

5KU also manufactures a separate 1913 Optic Mount for the Tokyo Marui AKM MMS Handguard. This version has a different product code and should not be confused with this 5KU-422 model for CYMA/GHK-spec MMS configurations.

This is particularly important with individual custom builds. Two mounts may look almost identical, whilst the way they attach to the corresponding handguard differs. You should therefore check, before purchasing, which MMS system is actually fitted to the replica.

Suitable for compact red dot sights

The five-slot Picatinny rail is particularly practical for a compact red dot sight. This allows a modern sighting system to be fitted to an AK platform without having to mount a long rail assembly across the entire receiver.

Which sight works best depends on the height of the mounting base, the position of the rail and the shooter’s personal shooting stance. A very high red-dot mount, for example, can still create a considerably higher line of sight, even though the 5KU mount itself is relatively compact.

Simple extension of an existing MMS build

If the replica is already fitted with the correct 5KU MMS handguard, this optic mount can be added to the system using the accompanying mounting hardware. The necessary mounting screws are supplied with the mount.

This allows an existing MMS build to be further expanded without immediately requiring a completely new handguard or dust cover. This makes the mount particularly appealing to shooters who wish to build their AK in a modular, step-by-step manner.

Practical insights

The 5KU 1913 Optic Mount for CYMA Handguard is particularly useful if you are already using a compatible 5KU MMS handguard and wish to create a central mounting position for a red dot sight. Before fitting, first check that the handguard itself is securely fastened. After all, a sturdy optic mount on a handguard with play is of little use.

Next, carefully fit the 1913 mount and tighten the fixing screws evenly. Only fit the optic once the mount has been correctly aligned, and check again after the first day of play to ensure that all fixings are still secure. When used on a GBB platform, this periodic check is particularly advisable due to the movement and vibrations that occur during use.

Who is the 5KU 1913 Optic Mount for CYMA Handguard suitable for?

The 5KU 1913 Optic Mount for CYMA Handguard is designed for airsoft players and custom builders who have fitted a compatible CYMA or GHK-spec AK74S, AK104, AK105 or AKM fitted with a 5KU MMS handguard and wish to add a Picatinny optic to it.

For users of a standard AK without an MMS handguard, this is not the correct mount. In that case, a different optical solution is required, such as a compatible AK side mount, a railed dust cover or a handguard with an integrated optical interface.

Specificaties

• Note: 5KU
• Product: 1913 Optic Mount for CYMA Handguard
• Producttype: Optic mount
• Platform: AK-serie
• Material: Aluminium
• Manufacturing method: CNC-milled
• Rail standard: M1913 / Picatinny
• Railbreedte: 20 mm
• Number of rail slots: 5
• Installation position: Above the receiver
• Montagesysteem: 5KU MMS AK Handguard System
• Design: JMac MMS style
• Suitable for CYMA: Yes, with a compatible MMS configuration
• Suitable for GHK: Yes, with a compatible MMS configuration
• Compatible AK platforms: AK74S / AK104 / AK105 / AKM
• Suitable for standard AK handguard: No
• Tokyo Marui AKM MMS version: Separate model
• Mounting hardware included: Yes
• Suitable for Picatinny red dot sights: Yes
• Application: Airsoft

Common mistakes

• Do not assume that this mount will fit directly onto every CYMA or GHK AK. A compatible MMS handguard is required.
• Do not confuse this 5KU-422 with the separate version for Tokyo Marui AKM MMS systems.
• First, check that the MMS handguard itself is fitted correctly and without any play before fitting the optic mount.
• Tighten the fixing screws evenly and do not overtighten them.
• Do not simply fit a very large or heavy mounting device without taking into account the limited rail space and the intended use of this compact mount.
• Don’t base your decision solely on the appearance of an MMS handguard. Check the actual model and compatibility.
• After using it a few times, check again that the fixing screws are still securely tightened.
• With GBB replicas, bear in mind that there may be additional vibrations and movement during use.

Frequently Asked Questions

Does the 5KU 1913 Optic Mount fit directly onto any CYMA AK?
No. The mount is designed for compatible CYMA AK platforms fitted with the appropriate 5KU MMS handguard system.

Which AK models is the mount designed for?
The specified compatibility includes, amongst others, the AK74S, AK104, AK105 and AKM within suitable CYMA/GHK-spec MMS configurations.

Does this mount also fit GHK AK replicas?
Yes, the mount is also available for compatible GHK AK platforms fitted with the correct MMS handguard system.

Does this version fit a Tokyo Marui AKM?
Not necessarily. 5KU has a separate version for the Tokyo Marui AKM with an MMS handguard. You should therefore check carefully which version you need.

Which rail does the mount use?
The mount features a M1913 / 20mm Picatinny rail with five slots.

Can I fit a red dot sight on this?
Yes. A compact red dot sight with a compatible Picatinny mounting base is one of the main uses of this mount.

Are the fixing screws included?
Yes. The necessary fixing hardware for mounting on the MMS system is included.

Is the mount made of plastic?
No. The mount is made from CNC-machined aluminium.

Do I need to make a permanent modification to my AK?
When used with the designated 5KU MMS handguard, the mount is designed as an additional component of the existing system and does not normally require a permanent modification to the receiver.

Can I use this mount without the MMS handguard?
No. This is an accessory for the MMS handguard system and not a standalone universal AK optic mount.

The 5KU 1913 Optic Mount for CYMA Handguard is a compact CNC-machined aluminium extension for compatible 5KU MMS AK handguards, allowing you to create a sturdy 5-slot Picatinny mounting position for a red dot sight or other suitable optic.