Introduction to the MB 550 Trap
Contrary to any pharmacological suggestions, the MB 550 is not a medication but a widely respected tool in the world of wildlife management and fur trapping [1.2.1, 1.2.2]. Manufactured by Minnesota Trapline Products, the MB-550 is a coil spring foothold trap that has become one of the most popular choices for predator trappers across North America [1.2.2, 1.2.5]. Its design focuses on durability, efficiency, and holding power, making it suitable for a variety of conditions and target species [1.2.7]. The trap is known for being well-constructed and ready to use almost immediately out of the box, requiring minimal adjustments compared to some other models on the market [1.2.2]. This makes it a favored option for trappers who want a reliable and effective tool for a mixed species trapline [1.2.1].
Core Features and Specifications
The success of the MB 550 lies in its specific design features, which are optimized for its target animals. Understanding these specifications is key to knowing why this trap is so effective.
- Jaw Spread: The MB 550 typically has an inside jaw spread of 4.75 inches and an outside jaw spread of 5.5 inches [1.2.1]. This size is ideal for securing a solid hold on the foot of a coyote, bobcat, or fox without being excessively large [1.4.2].
- Jaw Construction: The jaws are made of 3/8-inch thick cast steel, which provides smooth, rounded edges [1.2.2]. This design is similar to a laminated trap, minimizing pressure and potential injury to the animal's foot by encouraging blood flow [1.2.2]. Many models come with an offset jaw, which leaves a 3/16-inch gap when closed, further enhancing circulation [1.3.1]. Rubber-padded jaw models are also available [1.2.1].
- Pan System: It features the Paws-I-Trip (PIT) pan system with a "night latch" dog [1.2.1]. This mechanism ensures the pan sits perfectly level and provides a crisp firing of the trap with minimal pan travel, leading to more consistent catches [1.2.2]. Pan tension out of the box is typically around 2.1 to 2.5 pounds for the 2-coil version [1.2.1, 1.3.1].
- Frame and Baseplate: The trap is built on a strong, often gusseted, two-piece frame and includes a heavy-duty baseplate [1.2.3]. The chain is center-mounted on a D-ring, which helps prevent the trapped animal from pulling out by keeping pressure in a straight line [1.2.2].
- Chain and Swivels: It comes equipped with high-quality machine chain and typically two "crunch proof" swivels [1.2.3, 1.3.1]. This robust system prevents the chain from binding or twisting as the animal moves, reducing the risk of injury and escape [1.2.2].
What Animals Is the MB 550 Used For?
The MB 550 is specifically designed as a multi-species predator trap. Its size, strength, and pan tension make it a versatile choice for a range of furbearers [1.4.2].
- Primary Targets: The most common target animals are coyotes, bobcats, red and grey foxes, and raccoons [1.2.1]. The trap is tough enough to hold the largest coyote, yet sensitive enough for the lighter-footed fox [1.2.1].
- 2-Coil vs. 4-Coil: The standard model is a 2-coil spring trap. A 4-coil version is also available, which increases holding power and pan tension to an average of 4.1 pounds [1.3.1]. The 4-coil model is generally recommended for areas with very large coyotes and is often not recommended if grey fox is a primary target, as the increased power is not necessary [1.4.6, 1.4.7].
Preparing and Setting the MB 550
Proper preparation and setting are crucial for success and safety.
- Preparation: Before first use, new traps should be cleaned to remove oil and residues. Many trappers then dye the traps with a product like logwood dye to camouflage them and provide a protective coating against rust [1.2.4]. A final coating of wax can lubricate the parts and further prevent rusting [1.5.2].
- Setting the Trap: Compressing the coil springs allows the jaws to open. This can be done by hand or with a trap setting tool [1.7.3, 1.6.1]. Once the springs are compressed, the jaws are held open, and the dog is brought over the loose jaw and set into the night latch notch on the pan [1.7.3].
- Bedding the Trap: The trapper digs a hole, or "trap bed," just large enough for the trap [1.7.5]. The trap must be bedded firmly in the dirt so that it does not move or wobble when an animal steps on it [1.7.5]. The area inside the jaws is then covered with a pan cover and a light sifting of dirt to conceal the trap [1.2.4].
Comparison of Popular Predator Traps
While the MB 550 is a top contender, other traps are also popular. The Duke 550 Pro Series is a notable competitor, largely seen as a more affordable copy of the MB 550 [1.2.2].
| Feature | MB 550 | Duke 550 Pro Series | Bridger #2 Dogless |
|---|---|---|---|
| Jaw Spread | 4.75" Inside [1.3.1] | ~5.5" Outside [1.3.5] | 5 9/16" Outside |
| Construction | Made in USA with high-quality components [1.2.2] | Made in China, some reports of weaker parts [1.2.2] | Solidly built, considered a good value [1.6.4] |
| Key Feature | Paws-I-Trip pan, night latch, center-swiveled [1.2.1] | Step-down PIT pan system, double base plate [1.3.5] | Dogless design with a large pan [1.6.4] |
| Out of Box | Ready to use with minimal tuning needed [1.2.2] | Often requires more tuning and adjustments [1.2.2] | May require adjustments to the pan/night latch [1.6.4] |
| Price Point | Higher-end, considered a quality investment [1.2.2] | More affordable, good for high-theft areas [1.2.7] | Good value, priced between Duke and MB models [1.6.4] |
Legal and Ethical Considerations
Crucially, trappers must always consult their state and local wildlife regulations before using any trap [1.3.3]. Laws dictate legal trap types, jaw spread limits, setback distances from trails, and tagging requirements [1.8.1, 1.8.6]. For example, some states require traps to have offset jaws or a certain jaw thickness, while others have specific limits on chain length and swivel configurations [1.8.2, 1.8.5]. Checking these regulations is the trapper's responsibility. An excellent resource for this is your state's fish and wildlife agency website.
An authoritative outbound link for general trapping regulations can be found at the Association of Fish & Wildlife Agencies: https://www.fishwildlife.org/afwa-inspires/furbearer-management
Conclusion
The MB 550 is used as a robust, reliable, and versatile foothold trap for medium-sized predators like coyotes and bobcats. Its reputation is built on high-quality American manufacturing, thoughtful design features like the PIT pan system and thick cast jaws, and its effectiveness right out of the box [1.2.2]. While it comes at a higher price point than some competitors, many trappers consider it a worthwhile investment for its durability and proven performance on the trapline [1.2.2, 1.2.7].
