Bandai 1/144 HG GM3 Beam Master (RGM-109 Heavy-Gun Custom)

This is my second RGM-86RBM GM 3 Beam Master kit. The first was customised to look like a GM3 “Kia” and the second is customised to look like RGM 109 Heavy-Gun from F91.

Bandai 1/144 HG GM3 Beam Master [Yukki's Mobile Suit]

This is my side-by –side comparison to my two Beam Master kit customised to look very different from each other; one is a GM3 “Kai” and the other RGM-109 Heavy-Gun Custom.


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This is my side-by-side comparison to my Riku’s Gundam OO Diver. Riku and Yukki are school friends who started playing Gunpla together in the Build Diver anime.

Bandai 1/144 HG GM3 Beam Master [Yukki's Mobile Suit]

This is my side-by-side comparison to my RGM-89 Jegan Blast Master which is another Build Diver kit that is also piloted by Yukki.

Bandai 1/144 HG Jegan Blast Master (Yukki’s Mobile Suit)
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This is my side-by-side comparison to my F91 Gundam. I appreciate that the GM3 is probably not in the correct scale for the F91 series but the G3 is fairly standard height for most Universal Century Mobile Suit, and you can see that F91 Gundam is designed to be much smaller than a standard Mobile Suit.  

Bandai 1/144 HG GM3 Beam Master [Yukki's Mobile Suit]

This is my side-by-side comparison to my EG RX-78-2 Gundam. As you can see, the EG kit do not have much surface details and this is very much similar to the HG GM3 kit.

Bandai 1/144 HG GM3 Beam Master [Yukki's Mobile Suit]

And finally this is my side-by-side comparison to my Origin RX-78-2 Gundam. Both GM3 and the RX-78-2 Gundam are very similar in height; and you can also see that the old HG kits has much less surface details when compared to the newer Origin series kit.

Bandai 1/144 HG GM3 Beam Master [Yukki's Mobile Suit]

Build Divers kits are often a mixed bag of older HG kits and modern add-on parts or accessories. The Beam Master is basically a GM3 but with a new head and weapons. It is also candidly known as the Orange Cheddar.

I bought this kit from They are a UK based gunpla store, I tend to get my kits relatively quickly compared to other local online retailers.

Would I recommend this kit?

Yes, if you look beyond the orange and over-sized gun! It is relatively an easy kit to put together and I especially like the idea that you have several options within the same kit to customise into a different model instead of following the box art.

I originally wasn’t too keen on the orange, and been testing with different colour scheme.

Finally, in the spirit of build divers, I decided to kit bash the Beam Master into a re-imagination of a RGM-109 Heavy-Gun from F91.

I tend to air brush my kits using a mixture of Tamiya or Vallejo acrylic paints.

I went with an old creamy white scheme because that is how I remembered Heavy-Gun as a kid watching the anime from a VCD!

I also used the rifle from Gun Cannon 2 and shield is from GM Sniper.

Although the Beam Master is designed to use the GM3 backpack but the backpack from Hazel Gundam has a closer similarity to the Heavy-Gun.

The Beam Master has a new modernised leg thruster which is moulded in 2 pieces. The part separation allow for easier painting in different colours.

The kit comes with the original GM3 leg thrusters as well but they are moulded as a single piece thus it is no-brainer not to use the newer parts.