Bushmaster Big Boy Gen 3 – Lightweight Series

Maximum silence. Serious strength. Without the extra weight.

The Bushmaster Big Boy was created for one simple reason: to make an HPA replica as quiet as possible.

The Lightweight Series takes the original Big Boy concept and makes it significantly tougher. It retains the lightweight construction players already know, but adds two major durability upgrades.

The reinforced 3D-printed bottom cap contains a full-length metal thread insert. This creates an exceptionally strong mounting point while keeping the overall construction lightweight.

At the front, the new impact-resistant, BB-proof top cap is designed to handle serious field use. Because sooner or later, your sound moderator is going to meet a doorway, barricade, tree or incoming BB. It might as well be ready for it.

Lightweight or Aluminium?

The Lightweight Series and Aluminium Series are two different upgrade paths built around the same Big Boy performance.

Choose the Lightweight Series if you want maximum sound suppression, excellent durability and the lowest possible front-end weight.

Choose the Aluminium Series if you prefer premium black-anodized aluminium caps and maximum material strength.

Neither is the “lesser” version. They simply prioritize different things.

Key features

• Maximum internal volume for exceptional sound suppression
• Full-length metal thread insert inside the reinforced bottom cap
• Impact-resistant, BB-proof top cap
• Lightweight carbon-fibre construction
• Studio-grade acoustic foam
• Integrated “fart flap” system
• Hand-built and extensively field-tested
• Developed by an airsoft player who may have taken his hobby slightly too far

Design philosophy

The Big Boy exists for one reason: ultimate silence.

By maximizing its internal volume, it delivers the highest level of sound reduction in the Bushmaster lineup without making your replica unnecessarily front-heavy.

This is the sound moderator I build for players who want to be as sneaky as humanly possible. It has been tested during real games, improved through player feedback and refined over several generations.

Specifications

• Length: approximately 180 mm
• Diameter: 60 mm
• Body material: carbon fibre
• Bottom cap: reinforced 3D print with a full-length metal thread insert
• Top cap: impact-resistant, BB-proof material
• Mount: 14 mm CCW
• Recommended platform: HPA

Options & Spare Parts

• Gen 2 Tracer Unit Add-on — install a compatible tracer unit inside your sound moderator.
• Replacement Foam Set for Big Boy — refresh the internal foam and maintain optimal sound suppression.

Performance notes

The Big Boy is primarily designed for HPA replicas. AEG and GBB platforms generally gain less from any sound moderator.

On HPA, however, the difference is immediate. This is the quietest model in the Bushmaster lineup.

Bottom line

Maximum internal volume, maximum sound suppression and a much tougher construction—without switching to aluminium caps.

If stealth is your priority and you want serious field durability while keeping the front of your replica lightweight, choose the Big Boy Lightweight Series.