Weapon / Shield

Every LARP player eventually wants to build their own weapon. Maybe you're tired of fighting with loaners. Maybe you want a sword that matches your character. Maybe you just watched a build video and thought "I can do that." You can. A basic boffer sword is one of the most forgiving first builds in any craft hobby, and if you mess up, you're out $20 in materials, not $200.

You're building a single LARP-safe weapon or shield. The construction is straightforward: a rigid core wrapped in shaped foam, coated for durability, and painted for looks. The hard part isn't the building. It's passing the safety check at your event.

Key Decisions

Core material is non-negotiable. Your game's rulebook specifies which core materials are allowed. Most systems accept fiberglass rods (solid or tubular), carbon fiber rods, or kitespar. Some ban fiberglass entirely. Some require a specific diameter range. Some have maximum weapon lengths that dictate core length. Read the rules before you buy anything. A .505" solid fiberglass rod from Goodwinds Composites or a similar supplier runs about $8-15 for a sword-length piece.

Foam type determines weapon feel. LARP foam comes in two main flavors: open-cell (soft, squishy, like a pool noodle) and closed-cell (firm, springy, like EVA floor mats). Most quality weapons use closed-cell foam for the striking surface because it holds shape better and doesn't compress after repeated hits. Cross-linked polyethylene foam (Volara or similar) is the gold standard but costs more. Blue camp pad foam is the budget option and works well for a first build. Expect to spend $5-15 on foam for a single weapon.

Coating protects your investment. An uncoated foam weapon lasts 2-3 events before it's shredded. A latex-coated weapon can last a full season or more. DAP (latex caulk thinned with water) is the cheapest option and works fine for boffer-style weapons. Plasti Dip spray gives a more uniform coat but stays slightly tacky. Purpose-built LARP latex from companies like Hexflex or Crystal Clear is the premium option at $15-25 per can but gives the smoothest, most paintable surface.

Phase-by-Phase Walkthrough

Research (Day 1). Read your game's weapon construction rules word for word. Note: approved core materials, minimum and maximum lengths, minimum foam thickness on striking surfaces, tip construction requirements (most require a minimum of 2" of foam past the core tip), and any prohibited features. Print or screenshot the rules so you can reference them at the workbench.

Design (Day 1-2). Decide on weapon type: sword, axe, mace, polearm, or shield. Sketch a profile with dimensions. For a first build, a single-handed sword in the 28-36" range is the easiest. Shields need a different core approach (usually plywood or foam board for the face) and a handle/strap system behind.

Sourcing (Day 2-3). You need: core rod (fiberglass or carbon fiber, cut to length), closed-cell foam (camp pad or LARP foam), open-cell foam for the pommel and tip, contact cement (DAP Weldwood original formula, the red can, NOT the water-based version), latex coating, flexible acrylic paint, and grip wrap (tennis racket tape or leather cord).

Core and foam construction (Day 3-5). Cut the core to length. Round or cap the tip so it can't punch through the foam (a coin epoxied over the end works). Glue foam to the core with contact cement, applying cement to both surfaces and letting it tack up before pressing. Layer the striking surface to meet minimum thickness (usually 5/8" over the core). Build up the tip with soft open-cell foam past the end of the core. Shape with scissors and a utility knife.

Coating and finishing (Day 5-7). Apply your latex coating in thin layers. 3-4 coats of thinned DAP or 4-5 light passes of Plasti Dip. Let each coat dry fully (1-2 hours between coats). Once the coating has cured overnight, paint with flexible acrylic paint. Don't use craft acrylics, as they crack when the weapon flexes. Wrap the grip with your handle material, securing with contact cement at each end.

Safety inspection (Day 7). Test the weapon yourself first. Swing it against your own forearm at fighting speed. If it hurts, it won't pass. Check: is the tip squishy when pressed flat? Does the core flex at least 45 degrees without cracking? Are there any hard spots where foam is too thin? Are all edges rounded? Does the grip feel secure? Have an experienced player inspect it if possible before taking it to an event.

Common Mistakes

• Core too stiff or too whippy. A core that doesn't flex enough delivers too much force. A core that's too thin whips dangerously. Match the core diameter to the weapon length per your game's guidelines.
• Insufficient tip padding. The tip takes the hardest hits and delivers the most dangerous thrusts. Most games require 2" of compressible foam past the end of the core. Build it thicker than the minimum.
• Using water-based contact cement. The blue-labeled DAP Weldwood "non-flammable" version doesn't hold foam well. Use the original formula (red label, flammable). Work in a ventilated area.
• Painting before the coating cures. Latex coating needs 24 hours to fully cure. Paint applied too early traps moisture and peels off within a few events.
• Skipping the grip. A bare core or smooth coating is slippery when sweaty. Tennis racket overgrip is $3 and makes the weapon dramatically easier to control.

A well-built boffer weapon takes one weekend and costs less than a meal out. Once you've built one, you'll want to build five.