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Maximize your harvest efficiency with the MK Martin MK 5000 Gravity Box, a high-capacity grain box engineered for reliability, control, and seamless unloading in the field. With capacities of 500 to 605 bushels (via 8” and 12” extensions), this ruggedly built gravity box is ideal for mid- to large-scale farming operations looking to reduce trips and keep material flow smooth.
Constructed with a robust 12-gauge steel hopper and supported by a 4”x8” wall rectangular tube underframe, the MK 5000 is built to handle heavy grain loads with ease. The standard dual unloading doors within a 57” wide opening offer precise metering, allowing you to fine-tune the flow of grain whether you’re unloading into an auger, cart, or truck.
Need more flexibility? The MK 5000 supports a wide range of optional upgrades, including a hydraulic door opener, grain divider, and rear ladder all of which enhance convenience, safety, and productivity in demanding field conditions. Matched perfectly with the 365 Horst Wagon, this model is a reliable grain handling solution you’ll depend on year after year.
| Specification | MK Martin MK 5000 Gravity Box |
|---|---|
| Model | MK 5000 |
| Capacity (Bushels) | 500 (Standard), 570 (w/ 8" Extension), 605 (w/ 12" Extension) |
| Hopper Construction | 12-Gauge Steel |
| Under Structure | 4" x 8" x .188" Wall Rectangular Tubing |
| Unloading Doors | Dual 28" Doors within 57" Width, Metering Control |
| Chute Height | 17" – 21" |
| Box Length | 196" |
| Box Width | 101" |
| Height (Less Wagon) | 89" (Standard), 98" (w/ 8" Extension), 101" (w/ 12" Extension) |
| Height (On Wagon w/ 22.5" Tires) | 123" (Standard), 131" (8" Ext.), 135" (12" Ext.) |
| Weight | 3,610 lbs (Standard), 3,845 lbs (8" Ext.), 3,915 lbs (12" Ext.) |
| Wheel Base | 142" |
| Suggested Running Gear | 365 Horst Wagon – 425/22.5 Tires |
| Optional Features | Hydraulic Door, Divider Kit, Rear Ladder, Tarp Kit, Center Dump, Unloading Auger |
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Overall rating: 4.7 / 5 from 110 reviews.
I've started using the mulcher I on several parcels of land 10 acres . I have grind down a couple of 14 inch stumps. Caution the mount bracket behind the mulcher motor exhaust gets extremely hot even with gloves on . But the unit so far seems to works very good it's well put together.
Forax Gas Powered Mulcher | Model GP40 | 40" Cutting Width | 14HP Kohler | For Tractors
The Firminator G3 is s heavy duty quality machine. The discs worked extremely well and planting and culti-packing is very smooth and easy. Working with Dillon at Ripping It Outdoors was a very good experience and seamless transaction.
Haven't used box scraper as much as I would like, due to a lot of rain. When I did use it worked like I wanted it to.
Product was fairly priced and they delivered it quickly.
Totally dig this forestry mulcher! It’s a true beast that munches up stumps and trees
Forax Gas Powered Mulcher | Model GP40 | 40" Cutting Width | 14-15 HP | For Tractors
The week before leaving for my mule deer hunt in Wyoming, I seeded the area surrounding the new runway at Wertheimer Airport in Norman. This past Tuesday, I returned to finish the job and was pleased to see that the seed I planted just two weeks earlier was already germinating and coming up nicely. These pictures show the freshly seeded areas alongside those planted two weeks ago. It’s a great comparison and a good example of what proper seedbed preparation and planting can accomplish. I used my Ferminator G-3, which is one impressive piece of equipment. It prepares the seedbed, plants the seed, smooths the soil, and firms everything up for good seed-to-soil contact—all in one efficient operation. I’ve owned and operated several no-till drills over the years, but I can say without hesitation that the Ferminator is the most efficient and versatile seeding machine I’ve ever owned. There’s something pretty satisfying about returning to a job and seeing those first green shoots coming through the ground. That’s when you know your hard work is paying off!
Pulls 100% better no sway and puts tongue weight over the axle
BP Conversions Bumper Puller Ball Hitch to Gooseneck Conversion System
Great machine. Working with Dillon was awesome. Even made me a custom mount for my Polaris.
Just got my Buffalo Turbine! Love it. Took a little bit to get used to getting the right angle for the nozzle, but not a problem. Side note, works much better if the frame is level as much as possible. Love it! Gary Haddock
Seems to be in order delivery wasn't able to use lift gate but tractor was able to take pallet off the truck bed. No damage to machine after visual check. won't know how it runs until rain stops. Staff at RippingitOutdoors was very quick to call and double check the type of backet needed for the unit to ensure the online order matched( to fit my skid steer quick attachment on my l2501 Kubota). Explained the teeth & belt could be ordered through them directly over the phone when/if needed as well as selling other types of custom made brackets for Utv's ect. All around Great customer service and would purchase from again.
Forax Gas Powered Mulcher | Model GP40 | 40" Cutting Width | 14-15 HP | For Tractors
Great device. Makes my property look good.
The machine is a Land Shark! Gobbled up brush and small trees and turned them into mulch in no time!
Forax Gas Powered Mulcher | Model GP40 | 40" Cutting Width | 14-15 HP | For Tractors
The unit arrived within the timeframe that was given. It’s an amazing implement. Would definitely recommend
Forax Gas Powered Mulcher | Model GP40 | 40" Cutting Width | 14HP Kohler | For Tractors
Hay rake works great. It’s a good value for the money. Ripping it outdoors was beyond helpful during the purchase!
Farm-Maxx Rotary Hay Rake | Model FRM-280 | Working Width 110" | 20+ HP | For Tractors
After spending way to much money for forest mulching services I discovered this wonderful machine. It's not a giant powerhouse forest mulcher, but it does everything a property owner needs to maintain a forested property. I wish I would have found it sooner.
Forax Gas Powered Mulcher | Model GP40 | 40" Cutting Width | 14HP Kohler | For Tractor
I wasn't sure what to expect, but it has proven to be a strong, durable, and terribly useful tool for clearing what I needed to clear. Thank you!
Works great and its easy to use.
Forax Gas Powered Mulcher | Model GP40 | 40" Cutting Width | 14HP Kohler | For Tractors
Love it . Now I am going to have to get a new tractor and a Lane Shark.
Baumalight MP330 Brush Mulcher | Cutting Path 30" | 15-40 HP | For PTO On Tractors
The Firminator is well built and functions well. I am having some trouble while planting mixed size seeds. Next time out I’ll try setting it so only the smaller seeds drop out the open it up for the larger seeds.
easy buying process and great communication. Mulcher works great, easily clears overgrown brush and even mulched a 5" thick mulberry tree fairly easily. running it off of my old 331 bobcat with no problem powering the drum at all. Only small issue which isn't a big deal is that the supplied hoses are about 16" too short to operate a full range of motion.
The Firmanator works great very well built .I am very happy I made this purchase.
This trap seems to be kinda hard to set off.
Works excellent and is very well made.
Over all built well. I like it is all cast iron and metal and not plastic. Had to modify fertilizer disc mount to fit correctly, nothing major, a little grinding. I modified the center link hitch point to accommodate my John Deere quick hitch. Have yet to plant with it but I’m sure it will work perfect. Love the grease fittings everywhere. Reminds me of the old farm equipment I grew up on, and still use periodically.
My firminator RT was delivered in good condition in ND. I will be using it next week. I have a 45 HP John Deere tractor that is supposed to lift 2000 lb but really struggles to lift this 6 foot firminator RT. I will just have to use in as a two pass operation for now. I do wish there was a better operating manual for this unit. Maybe that is something you can work on. I will give you an update once I start using it in a few days.
Great piece of equipment. Performs far better than I expected. One piece of advice - if property is significantly overgrown, consider the tractor attachment first to bring down the over growth and then switch to the UTV attachment to maintain property. No complaints worked perfectly.
Ordered a 36” clean out bucket for my mini excavator. Love it, welds are great. Works as it should.
Showed up on time and I will be using it to put in 15 acres of food plots in this weekend!
Very pleased. Product was better than anticipated and is working well. I expect the 2000lb feeders to last at least a decade based on my use with cattle. If feeding wild game would likely last a lifetime with minimal maintenance.
ASF Trio Feeder | Capacities 1,500lb & 2,000lb | Power Source 12V Battery
Great product. Works awesome on keeping my road clear of debris
Great experience. Easy transaction and fast shipping. The blade is built well and heavy duty.
Very good
Rammy 48", 55" & 61" ATV Snowblower 120/140/155 Professional Series SERIES 420CC Engine | For ATV
I like the mudder shoes. Looking forward to using them!
Forestry Supplies Mudder Boots | Mud & Snow Shoes | Float On Mud | One Size Fits All
Works as expected
seeds come out way to fast at lowest setting when planting alfalfa literally the only reason I bought it now I can't even use it and I can't return it so I'm stuck with it for the price you pay you would think it would work!
It’s built solid. It handles Field grass hip high pretty well. With the maintaining the field grass after the first cut, the pasture field is starting to look like a lawn. The 84 inch with the best thing to get for 8 acres. It’s best to order belts for back up in the event if the belts were to break. But overall, I like the product quality is good.
Farm-Maxx Grooming Mower | FMR Series | Working Width 48", 60", 72" & 84" | 15-50 HP | For Tractors
Definitely a better unit than you can find locally. I've ran several spreaders. This is by far the best.
When I think of ripping it outdoors something else comes to mind, but I digress. This spreader is awesome. Works like a champ. The hopper is big enough to do my 1 acre lot for my applications. Just load once and go. I would highly recommend this spreader. It saves a ton of time and is a quality product.
the way it was built is hefty and looks to be easy to operate
Rammy 48", 55" & 61" ATV Snowblower 120/140/155 Professional Series SERIES 420CC Engine | For ATV
good experience
Farm-Maxx Snow-Blowers | FSNB Series | Working Width 54", 68" & 74" | 15-50 HP | For Tractors
