Custom-Job: G3/MC51/MP5 Frontsight with ICS 74B Laser

Custom-Job: G3/MC51/MP5 Frontsight
with ICS 74B Laser
by SecuriTUX

Required Items:

ICS Laser 74B
G3 Frontsght (TM H&K MC51 with G&P (sold as TGS) R.I.S.)

Please note that some of the images are stored in higher resolution than shown on this page. You can view these images by "clicking" on the image.

Inspired by the manual (Figure 1) of the ICS 74B laser, where this laser is mounted into an ICS MP5, we decided to adapt it for TM G3/MC51 and MP5.

Figure 1: Manual for the ICS 74B Laser

Here you can find more information about the laser and the "ICS AN/PEQ Battery Box".

Step 1 - Adapting the Frontsight You need to drill a hole with diameter 14 mm into the center of the frontsight. Afterwards you drill the winding into the hole using a M15x1 screw tap.

Figure 2: M15x1 winding drilled into the G3 frontsight

After the adapting the frontsight you have to make over the winding of the laser by using a M15x1 screwplate. This has to be done because the orignal winding has been painted with black color after threading.

Figure 3: G3 frontsight with ICS 74B Laser

Step 2 (optional) - Fine Adjustment
The gap shown orange in Figure 4 can be removed by filing/drilling the inner diameter of the outer barrel. You need a drill with diameter 15.5 mm and the bore has to be a depth of 2 mm. The bore is shown as yellow area in Figure 4.

Figure 4: Detail: Gap between laser and frontsight Figure 5: Detail: M15 and
outer barrel

Pitfalls There are two pitfalls:

The bore in the frontsight has to be centered very price (maximum: 0.5 mm out of center), because the inner diameter of the outer-barrel and the diameter of the battery housing of the laser differ by approx. 1 mm.

When you make over the winding of the laser be careful. The wire of the pressure switch can be damaged, when the jaw chuck holding the laser is not tightend enough. So the laser can slip and the wire gets cut off.

Application This custom-job can be applied to all TM H&K AEGs (G3/MC51/MP5). It was tested on a G3 SG1 and a MC51. It may not be applicable to MP5Sx, MP5K and MP5PDW. So check the length and diameter of the bore of the outer barrel first.

If you have one of these AEGs, please send me an email with this measurments.

Note: You can not use any type of silencer if you apply this custom-job, because either the the laserbeam is masked by a silencer of a diameter larger than ... mm or you even can not attach the silencer parallel to the laser. This depends also on the type of silencer-adapter you use, because some types don't leave space between the frontsight and the silencer.

Summary

Pros: If you don't like R.I.S. and other lasermounts, like barrel-clamp this is the way you want to mount a laser. The laser is nearly hidden and you don't need any extra mounts.

The direction of the inner barrel and the laserbeam can not be affected by the flex between body/handguard and the inner barrel.

Cons: You have to work very precise and careful. Two expensive tools for making the windings and a fixed drilling machine is required.

The power of the laserbeam is not so strong like other lasers, beacause of the small batteries. Lasers with larger batteries can not be mounted this way, because their battery-housing has a bigger diameter than the outer barrel.

External Links: TBA

Site links: TBA

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