How to magnetize Gundam weapons for easy swap-outs

Magnetizing Gundam weapons gives your mobile suits a flexible loadout without forcing you to choose one display configuration. Rifles, shields, swords, ammunition packs, and interchangeable hands can all be secured with small neodymium magnets while remaining easy to remove.

The process is accessible to beginners, but careful planning matters. A magnet that is too large can damage a part, while weak magnets may let a heavy weapon sag or fall during posing. The best results come from matching magnet strength to the weapon’s weight and the joint’s available space.

This upgrade also makes storage and transport easier. Instead of permanently attaching every accessory, you can prepare several weapon options and switch them whenever you update a Display Case entry or photograph a new pose for the community.

Why use magnets in a Gunpla build

Most Gundam kits rely on pegs, friction joints, or molded hands to hold weapons. These systems work well when new, but repeated swapping can loosen plastic. A magnetized connection reduces wear and gives the builder more control over how often a weapon is changed.

Magnets are especially useful for shields, oversized rifles, beam sabers, and backpack equipment. They can replace fragile handles, reinforce shallow attachment points, and help balance a pose. A shield mounted with a concealed pair of magnets is less likely to twist when the arm moves.

The modification can remain almost invisible. Magnets may be hidden inside a hand, wrist, forearm, backpack, or weapon grip, preserving the kit’s original appearance while making its loadout modular.

Select magnets and map the polarity

Small disc magnets are the most practical choice for Gunpla. Common sizes include 2 mm, 3 mm, and 4 mm diameters, with thicknesses between 1 mm and 2 mm. Use the smallest magnet that provides enough holding power, particularly in thin armor parts.

Before drilling, decide which side of the connection will carry the north and south poles. Mark one face of every magnet with a permanent marker, then keep the marked side oriented consistently throughout the build. Reversed polarity is a common mistake that can make two parts repel each other.

Test the strength before committing to glue. Place the magnets on the outside of the parts and hold the weapon in a natural pose. If it slides under its own weight, choose a larger diameter, add a second magnet, or retain a small locating peg for extra support.

Prepare the parts without damaging them

Disassemble the relevant armor and remove mold seams before modifying anything. Use a pin vise rather than a power drill, since hand drilling provides better control in small pieces. Start with a narrow bit and enlarge the cavity gradually until the magnet fits.

Keep the hole slightly shallower than the magnet’s thickness at first. You can deepen it later, but repairing a cavity drilled through an armor panel takes more work. For a clean finish, aim for a snug fit that leaves enough surrounding plastic to prevent cracking.

Study the kit’s construction before choosing a mounting point. A Freedom comparison can be useful when considering how different grades and scales handle complex wings, armor sections, and equipment connections. Larger kits offer more room, while High Grade parts often require smaller magnets and lighter accessories.

Install and reinforce the magnetic joints

Once the cavities are ready, place the magnets temporarily and test the fit with the weapon attached. Confirm that the parts meet flush and that the magnet does not push the armor apart. If the connection has visible gaps, deepen one cavity slightly or create a recessed seat so the magnet sits below the surface.

Use cyanoacrylate glue for small, clean installations and two-part epoxy for heavy weapons or stressed backpack mounts. Apply adhesive sparingly with a fine tool. Excess glue can cover the magnet, prevent a flush fit, or seep into a visible seam.

For large accessories, combine magnetic force with mechanical support. A tiny peg, shallow tab, or keyed recess can carry sideways pressure while the magnets provide the holding force. This arrangement is more reliable than asking a single small magnet to resist every movement during posing.

Allow the adhesive to cure fully before painting or repeated testing. Keep loose magnets away from your work area while sanding, because they can attract metal dust and become difficult to handle.

Recommendations for dependable weapon swaps

A consistent system makes future modifications much easier. Standardize polarity across your collection and record magnet sizes in your build notes. You can also keep spare magnets attached to a labeled metal sheet so matching pairs are easy to find.

Use these practical habits when planning a modular loadout:

• Dry-fit every magnet before applying adhesive.
• Keep at least 1 mm of plastic around a drilled cavity when possible.
• Use paired magnets for heavy shields, fuel tanks, and large rifles.
• Leave a small locating peg when the joint experiences twisting force.
• Test painted and top-coated parts again, since added layers can reduce clearance.

After installation, pose the Gundam through its full range of movement. Swing the arms, rotate the wrists, and place the model on its action base. If the weapon shifts, identify whether the problem comes from weak magnetism, a poor contact surface, or an overloaded joint rather than immediately adding more magnets.

Paint, weather, and display the finished loadout

Mask magnet faces before priming and painting. Paint between two magnetic surfaces can reduce contact, and thick topcoat may create a small but noticeable gap. If paint has already covered the connection, carefully scrape the contact area with a hobby knife or fine file.

Weathering can make the modification blend into the build. Scratches around a rifle mount, darkened recesses near a shield bracket, and subtle dust on weapon grips all suggest repeated field use. For ideas on integrating surface treatment with a realistic military finish, explore these weathering techniques.

Create several loadouts before photographing the model. A standard rifle configuration can show the completed kit clearly, while a heavier artillery or melee setup demonstrates the value of the magnetic system. Store unused weapons in labeled bags or foam trays to protect painted edges and small details.

Magnetized equipment turns a fixed kit into a changing project. Share your experiments, polarity solutions, and successful joint designs on Gundam Eclipse so other builders can refine their own swap-ready builds.