Minelab Bow Knuckle and Bungee Kit for GPX Series Metal Detectors

Installing the bow knuckle and bungee kit requires no tools beyond your hands. First, remove the old wing nut and xxxx from your GPX shaft's mounting point. Slide the bow knuckle onto the shaft so the mounting tab aligns with the threaded hole. Thread the new 1/4-20 nylon xxxx through the knuckle's tab and into the shaft hole, then hand-tighten the black nylon wing nut onto the xxxx until the knuckle sits snug against the shaft. Loop the 6mm bungee strap through the bow knuckle's slot and around your forearm, adjusting strap tension by repositioning the knuckle up or down the shaft. Tighten the wing nut firmly by hand to lock the position. The installation process mirrors the factory assembly on your GPX detector, making replacement straightforward even in field conditions.

No, this bow knuckle and bungee kit is engineered specifically for GPX series detectors (GPX 4500, GPX 5000, GPX 6000) and will not fit other Minelab models. The mounting hardware uses a 1/4-20 UNC thread and shaft design that matches only the GPX series, so attempting to install it on an Equinox, Manticore, X-TERRA, or CTX detector will result in an incompatible fit. Those detector families require their own model-specific replacement parts with different mounting configurations. If you need a bungee or armrest kit for a non-GPX Minelab detector, browse our full catalog of metal detector parts and accessories to find the correct replacement assembly for your model.

The Minelab Bow Knuckle and Bungee Kit fits all GPX series metal detectors, including the GPX 4500, GPX 5000, and GPX 6000. The mounting hardware uses a standard 1/4-20 UNC thread that matches the factory attachment point on every GPX shaft, so installation is a direct drop-in replacement with no drilling or adapter brackets required. The 6mm bungee strap length and bow knuckle geometry are identical to the original equipment assembly that ships with new GPX units. This kit is engineered specifically for the GPX series and is not compatible with other Minelab detector families. If you need replacement parts for a different Minelab model, browse our full catalog of metal detector parts and accessories to find the correct assembly for your detector.

The kit includes four components: one black injection-molded bow knuckle connector, one 6mm RoHS-compliant bungee strap, one 1/4-20 x 1.5-inch nylon UNC xxxx , and one 1/4-20 UNC black nylon wing nut. These are the exact parts Minelab ships as original equipment on GPX detectors, so you get factory-spec hardware rather than a third-party substitute. The wing nut tightens by hand without requiring a wrench or pliers, making field adjustments simple and tool-free. No instructions are included because installation mirrors the existing assembly on your GPX shaft. For step-by-step guidance on mounting the kit, check our metal detecting tips and FAQs page.

The 6mm RoHS bungee strap's lifespan depends on your detecting frequency and field conditions. The elastic loses tension gradually as you log hours in the field, and you'll notice the detector feels looser on your arm or the bow knuckle slides down the shaft mid-swing when the strap stretches beyond its effective range. Factors like coil weight, temperature extremes, and exposure to dust or moisture affect how quickly the elastic degrades. Carrying a spare kit on multi-day remote hunts is standard practice for GPX owners because a failed bungee mid-trip means you lose detector balance and swing efficiency until you can replace it. The kit's affordable price makes keeping a backup in your gear bag a practical choice for serious prospectors.

The bow knuckle is made from injection-molded ABS plastic, the same material Minelab uses on factory GPX assemblies. This plastic is chosen for its ability to handle constant arm movement and the occasional drops that occur during field use. The component is designed to withstand the demands of prospecting when properly installed and maintained. Proper installation is key to longevity: hand-tighten the wing nut firmly without using pliers or a wrench to avoid placing excessive stress on the plastic. When installed correctly, the bow knuckle provides reliable performance across many hours of detecting in challenging field conditions. The kit's factory-spec construction ensures you get the same quality and durability as the original equipment that shipped with your GPX detector.

The 1/4-20 nylon xxxx and wing nut are chosen for their performance in prospecting environments. Nylon hardware maintains functionality in the dusty conditions GPX owners encounter in goldfields, where fine particles can work into threaded connections. The material is well-suited for the bow knuckle mounting application, where the fasteners secure the assembly without requiring high tensile strength. The wing nut design allows hand tightening without tools, which means you can adjust bungee tension in the field without carrying a wrench. The black nylon construction provides a clean appearance that matches the GPX detector's finish. Minelab selected nylon hardware as original equipment for the GPX series, and this replacement kit maintains that same specification for consistent performance and ease of use.

Yes, you adjust bungee strap tension by loosening the black nylon wing nut, sliding the bow knuckle up or down the GPX shaft to change the strap's effective length, then retightening the wing nut to lock the new position. Moving the knuckle higher on the shaft shortens the bungee loop and increases tension, which is useful when running lighter coils or when the elastic has stretched over time. Moving the knuckle lower lengthens the loop and reduces tension, which works better for heavier coils or when you want a looser fit around your forearm. The adjustment requires no tools because the wing nut tightens by hand. GPX prospectors typically fine-tune strap tension at the start of each hunt based on the coil size they're running that day. For more setup tips, visit our metal detecting tips and FAQs page.

Yes, this bow knuckle and bungee kit is an official Minelab replacement part and carries Minelab's manufacturer warranty when purchased from an authorized dealer like Serious Detecting. The warranty protects you against defects in the components you receive, such as a cracked knuckle out of the box, a bungee strap that fails immediately, or stripped threads on the nylon hardware. If you receive a defective kit, contact our support team within 30 days of purchase and we'll coordinate a replacement through Minelab's U.S. service network. Minelab's warranty terms vary by component type and purchase date, so check your detector's original warranty documentation for specific coverage details. As an authorized dealer, we stand behind every Minelab product we sell and work directly with the manufacturer to resolve any quality issues.

The complete kit (bow knuckle, 6mm bungee strap, nylon xxxx , and wing nut) is lightweight and adds minimal mass to your GPX detector. Replacing a worn bungee kit with a new one maintains your detector's original swing characteristics because the new assembly has the same geometry and construction as the original equipment part. The 6mm bungee strap diameter and elastic tension match the factory specification, so your GPX will feel identical to how it swung when new. Prospectors who carry a spare kit in a belt pouch or backpack add only a small amount to their field load, which is a worthwhile tradeoff for the ability to replace a failed bungee mid-hunt without hiking back to the truck. The kit's compact size makes it easy to pack as a backup for extended detecting trips.