HK Army Hostile braided HPA line shown in seven color options: grey, red, purple, olive, tan, blue, and black, each coiled with black quick-disconnect fittings at both ends.
HK Army Hostile Flex Line 42" Hose
HK Army Hostile Flex Line 42" Hose
HK Army Hostile Flex Line 42" Hose
HK Army Hostile Flex Line 42" Hose
HK Army Hostile Flex Line 42" Hose
HK Army Hostile Flex Line 42" Hose
HK Army Hostile Flex Line 42" Hose
HK Army Hostile braided HPA line shown in seven color options: grey, red, purple, olive, tan, blue, and black, each coiled with black quick-disconnect fittings at both ends.HK Army Hostile Flex Line 42" HoseHK Army Hostile Flex Line 42" HoseHK Army Hostile Flex Line 42" HoseHK Army Hostile Flex Line 42" HoseHK Army Hostile Flex Line 42" HoseHK Army Hostile Flex Line 42" HoseHK Army Hostile Flex Line 42" Hose

HK Army Hostile Flex Line 42" Hose

$34.99



Order today for same-day fulfillment • Estimated delivery Sep 7–8
Color: Purple
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Frequently Bought Together

Complete your setup with the most common add-ons.

HK Army 48/3000 Aluminum Tank with Regulator

$49.95

Prometheus Hard Anti-Reversal Latch

$17.99

HK Army Precision BB's

$17.99

Nexxspeed CNC Aluminum Thumb Rest (Left Side) for AAP01

$29.99

he Hostile Airsoft Flex Line – the perfect connection for your HPA setup. This 42-inch line hits the sweet spot in length, giving you the freedom to move without getting tangled. With dual quick disconnects on both ends, switching up or breaking down your gear has never been easier. Its high-strength nylon sheathing keeps it durable and ready for any action, while the wide-bore design ensures max airflow to keep you shooting strong. Available in multiple colors, it fits most regulators and HPA systems. Get connected, stay locked in, and let the Flex Line power up your game.

  • Optimal Length: 42-inches for ideal flexibility and reach
  • Dual Quick Disconnects: Convenient disconnects on both ends for fast setup and takedown.
  • 200 PSI Max Pressure: Can withstand up to 200 PSI input pressure
  • High-Strength Nylon Sheathing: Durable outer layer designed for heavy use
  • Wide-Bore High Flow: Maximum airflow for consistent performance
  • Universal Fit: 1/8" NPT Fitting. Compatible with most regulators and standard HPA systems
  • Available in Multiple Colors: Customize your gear with color options to match your style

Common Product Questions

Find quick answers about our airsoft products, shipping and policies.

Can LA Airsoft install this part for me?

Yes. We can build and upgrade Hi-Capas, AAP platforms, and rifles. Choose your base gun and parts, then add the appropriate tech service.

The current custom-build service states that builds are normally completed in approximately 3 to 5 days, with the team reviewing the selected parts for compatibility.

Do I need tools or gunsmithing?

That depends on the upgrade. Simple external parts may be straightforward, but internal upgrades can require disassembly, reassembly, adjustment and testing.

If you are not comfortable working inside your airsoft gun, our team offers professional tech and custom-build services.

How quickly will my order ship?

Orders without preorder items are typically packed the same day when placed before 4:30 p.m. Central Time. Please note that occasional delays can occur during especially busy periods or when staffing is limited.

How should I maintain this product?

Regular maintenance helps preserve performance and reliability. Keep the product clean, follow the manufacturer’s lubrication instructions, and properly manage batteries, gas systems, and internal components. More advanced repairs or internal servicing should be handled by an experienced airsoft technician.

Will this part fit my platform?

Compatibility is product-specific. Check the brand, model, size, and platform named in the product description, such as Tokyo Marui Hi-Capa 4.3 or 5.1, AAP-01, Umarex/VFC Glock, or a particular AEG gearbox type.

Similar-looking parts are not always interchangeable, so contact our team with your exact model if you are unsure.

Will this part increase my FPS?

Not every upgrade increases FPS. Some parts are designed primarily for reliability, cycling speed, weight reduction, or gas efficiency. When a product has a tested FPS claim, it should be stated in the listing.