Swiss Arms FN 509 Civillian - 4.5mm BB Air Pistol

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The FN Herstal 509 CO₂ Blowback Air Pistol delivers a perfect balance of realism, performance, and precision, making it an ideal choice for collectors and shooters alike. Fully licensed by FN Herstal, this replica faithfully reproduces the look and feel of the real FN 509 — from the authentic trademarks to its ergonomic, ambidextrous controls and combat-ready design.

Constructed with a durable aluminium alloy slide and a reinforced polymer frame, the FN 509 combines strength with lightweight handling. The gas blowback system delivers a crisp, realistic recoil, while the adjustable hop-up system ensures consistent accuracy with every shot. Its tri-dot combat sights allow for fast and intuitive target acquisition, whether on the range or during action-style shooting practice.

The pistol fires 4.5mm steel BBs at velocities of up to 315 FPS, powered by standard CO₂ cartridges for dependable performance. A 20mm Picatinny accessory rail beneath the barrel provides mounting options for tactical lights or lasers, enhancing versatility.

Every detail — from the 17-round magazine to the textured grip and slide serrations — contributes to a highly realistic shooting experience, true to FN’s military heritage.

Key Features:

Fully licensed by FN Herstal with authentic trademarks

Durable metal slide with realistic blowback action

Adjustable hop-up for improved accuracy

Tri-dot combat sights for quick target acquisition

Ambidextrous controls for left- and right-handed shooters

20mm accessory rail for lights and lasers

Fires 4.5mm steel BBs at up to 315 FPS

17-round magazine capacity

Length: 21.9 cm | Weight: 0.8 kg

The FN Herstal 509 CO₂ Blowback Air Pistol is a premium, high-performance replica that combines authentic design, tactical practicality, and reliable shooting precision — a must-have for enthusiasts who demand both realism and quality.

What is the deposit feature for backorders?

The deposit feature allows you to reserve an airgun that is currently out of stock by paying just 10% of the product's price. You can secure the item and pay the remaining amount when it's back in stock and ready for delivery.

How do I place a backorder with a deposit?

To place a backorder with a deposit, simply select the item you want, click the "Backorder with Deposit" option, and proceed to pay 10% of the product's price. Your order will be held until the item is back in stock.

Can I use financing options for backorders with a deposit?

No, financing options are not available for the deposit feature. Backorders with a deposit require a one-time payment of 10% of the product's price.

Is the deposit refundable if I change my mind?

Yes, your deposit is fully refundable. If you decide not to proceed with the purchase before the item is in stock, please contact our customer support team to initiate the refund process.

When will I need to pay the remaining balance?

You'll be notified via email when the item is back in stock and ready for delivery. At that point, you can log in to your account and pay the remaining balance for the airgun.

How long do I have to pay the remaining balance?

We will provide you with a reasonable window of time to pay the remaining balance, typically within 14 days of the item becoming available. Regular email updates will keep you informed.

Can I change my shipping address or other details after placing a backorder with a deposit?

Yes, you can update your shipping address and other order details by contacting our customer support team before the item is ready for delivery.

What happens if the item I backordered is discontinued or unavailable?

If the item becomes unavailable or is discontinued, we will refund your deposit in full and notify you as soon as possible.

Can I cancel my backorder at any time?

You can cancel your backorder and request a refund of your deposit at any time before the item is in stock. Please contact our customer support team to initiate the cancellation process.

Is the deposit feature available for all airgun products?

The deposit feature is available for select airgun products. Look for the Preorder option on the product page to see if it's available for the item you want to purchase.