FMA FBUS Gen2 Iron Sights – OD Green 20mm

The FMA FBUS Gen2 iron sights are a no-nonsense upgrade for any airsoft rifle equipped with a 20mm Picatinny rail system. Based on proven military designs, they offer the accuracy and dependability skirmishers and milsim players expect in the field.

Key Features

• Fixed iron sight design – stable, zero-shift aiming without batteries or adjustment failures
• Olive Drab finish – blends with modern tactical loadouts and resists glint
• 20mm Picatinny compatible – fits standard UK airsoft rifle top rails
• Included adjustment tool – rear sight windage tuning for precise zeroing
• Lightweight metal construction – minimal impact on rifle balance and handling

Real-World Use Cases

Whether you’re running a primary rifle at a woodland skirmish, setting up for squad-level milsim, or building a backup AR platform, fixed iron sights eliminate the need for co-witnessed optics and deliver immediate, redundant aiming capability. They’re ideal for players who value simplicity and reliability over magnification.

Technical Specifications

• Sight Type: Fixed-position front and rear
• Rail Compatibility: 20mm Picatinny
• Finish: Olive Drab
• Extras: Adjustment tool included

Compatibility & Upgrades

These sights suit any airsoft rifle or carbine with standard 20mm top rails—M4, M16, AK variants with Picatinny adapters, and designated marksman rifles all benefit from their robust, no-fuss design. Pair them with a red-dot for co-witnessed backup aiming, or run them standalone for a lightweight, low-profile setup.

UK Legal & Site Notes

Airsoft iron sights are unrestricted. Always confirm your skirmish site’s rules on sight types and rail systems; most sites welcome mil-spec accessories. Check your rifle’s rail fitment before purchase.

Upgrade your rifle’s aiming system with FMA FBUS Gen2 iron sights and shoot with confidence.