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HK Fossil - Eclipse CS3 - LE Riptide

HK Fossil - Eclipse CS3 - LE Riptide

HK Fossil - Eclipse CS3 - LE Riptide

HK Fossil - Eclipse CS3 - LE Riptide

HK Fossil - Eclipse CS3 - LE Riptide

HK Fossil - Eclipse CS3 - LE Riptide

HK Fossil - Eclipse CS3 - LE Riptide

HK Fossil - Eclipse CS3 - LE Riptide

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HK Fossil - Eclipse CS3 - LE Riptide

$2,399.95

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Meet the HK Fossil Eclipse CS3 which offers more, across many aspects of its design. Let's start with the NEW OP Core drivetrain. With its Industry First Fully Double Decoupled drive (FDD), and integrated auto dwell dynamics (ADD) it provides supreme consistency, efficiency and reliability, in our most powerful and intelligent spool drive assembly to date. Its 50% increase in valve chamber volume enables the OP Core to operate at an insanely low pressure range of 95-105psi, which not only offers a reduction in sound signature, but noticeably reduces bolt force and recoil and an approximate increase of almost 20% in efficiency over the CS2 that this replaces. The OP Core benefits from the NEW Cure FT bolt that has a higher air flow rate throughout its 3-stage acceleration and completes the truly impressive OP Core drivetrain package.

The CS3 prides itself on not only delivering power from its incredible levels of performance, but on the confidence it gives the player when they step under the net. The ergonomics, how the marker feels in the hand and how the player becomes at one with the marker are important to the success of both parties. With a longer grip pitch, a higher rear hand position on the frame, and a reduced overall height from barrel bore to tank centerline, the stance of the CS3 feels instantly more aggressive than its predecessors. But also instantly familiar to those who have spent any time with any Eclipse high end offering. Visually, the CS3 appears more purposeful with its aggressive stance, confident milling, and poise.

Features

HK Army Custom Fossil Milling
HK Army Fossil Milled Shaft S63 Barrel Back with 2 PWR Inserts (.689 & .685)
Frame With Extended Reach and revised Grip Geometry
High Flow FT Bolt with Lower Operating Pressure – 95-105psi
Reduced Recoil and Reduced Sound Signature
5 Point Adjustable Blade Trigger W/ Rake Control
MME Electronics Package W/ BLE Bluetooth and OLED Rear Mounted Display
Quick Release Bolt and Eye Covers
Hoseless Air Transfer System
Low Profile Feed Neck With Locking Sprocket Wheel
Lock N' Load Battery Holder W/ 2 X AA Battery Operation
Fully Mech Compatible – Mech Frame Sold Separately
Hard Zipper Case W/ Comprehensive Parts Kit and Allen Wrench Set

HK Fossil - Eclipse CS3 - LE Riptide

HK Design

HK Army Fossil finish with Planet Eclipse flagship performance.

HK Fossil - Eclipse CS3 - LE Riptide

ERGONOMIC GRIP

Hold an aggressive stance that feels locked-in and balanced during snap shots and lanes.

HK Fossil - Eclipse CS3 - LE Riptide

FIELD FRIENDLY

Tool-less wraparound grips, quick-release bolt, tool-less eye covers, and AA battery “lock-n-load” power make service fast.

HK Fossil - Eclipse CS3 - LE Riptide

UNRIVALED SHOT

OP Core drivetrain delivers roughly 20% better efficiency.

TECHNICAL SPECIFICATIONS

HK Fossil - Eclipse CS3 - LE Riptide

Custom Fossil-milled body design by HK Army
OP Core Drivetrain with Fully Decoupled Drive (FDD)
Auto Dwell Dynamics (ADD) for improved efficiency and consistency
Operates at 95–105 PSI for reduced recoil and sound signature
Cure FT high-flow bolt with 3-stage acceleration
S63 Pro 14.5" 3-piece barrel system with custom Fossil back
Includes two PWR inserts: 0.685" and 0.689"
Extended ergonomic grip geometry and revised foregrip
Modular Marker Electronics (MME) with Bluetooth Low Energy
Rear-mounted OLED display
Toolless Lock-N-Load battery holder (2× AA batteries)
5-point adjustable blade trigger with rake control
Quick-release bolt system for fast maintenance
Low-profile clamping feedneck with locking sprocket
Custom anodized finish and exclusive HK Army branding

MANUALS AND DOCUMENTATION

Customer Reviews

17 Total

HK Fossil - Eclipse CS3 - LE Riptide

What's New

New Gear for 2026

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ALPHA AIR RESTOCK

ALPHA AIR RESTOCK

SHOP TANKS

Alpha Air Systems have been restocked in 48ci, 68ci, 77ci and 88ci.

Hex PWR Barrel Restock

Hex PWR Barrel Restock

BARREL BUILDER

Pick your colors and build your own custom Hex PWR Barrel Kit.

BAGS + CASES

BAGS + CASES

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Discover Expand Bags and EXO Cases to store and protect your gear.

NEW RMX GOGGLE COLORS

NEW RMX GOGGLE COLORS

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The HK Army RMX Goggle System delivers toolless lens swaps, anti-fog dual-pane clarity, and tri-layer comfort foam.

WYN33 Lubricant

WYN33 Lubricant

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Silicone-based lubricant in 10 easy-use pouches.

Paintball markers

Paintball markers

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See the newest HK Army Paintball Markers for beginners to pro.

TEAM SPONSORSHIP

TEAM SPONSORSHIP

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Applications are now open for paintball and airsoft teams for 2026 sponsorship.

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