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RealTruck

RealTruck BAK BAKFlip MX4 Hard Folding Truck Bed Tonneau Cover | 448130 | Fits 2019-2026 Chevy/GMC Silverado/Sierra, w/MultiPro/Flex Tailgate (Will not fit Carbon Pro Bed) 5' 10" Bed (69.9")

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Availability: In Stock.
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Arrives Wednesday, Mar 25
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Style: BAKFlip MX4


Size: 5' 10" Bed


Features

  • Fits 2019 - 2026 Chevy/GMC Silverado/Sierra, w/ MultiPro/Flex tailgate (Will not fit Carbon Pro Bed) 5' 10" Bed (69.9")
  • THE BEST-SELLING TRUCK BED COVER IN THE WORLD JUST GOT BETTER
  • NOW EVEN MORE SECURE THAN GEN 2 | The new BAKFlip MX4 comes with an updated design tested to keep your gear on theft-resistant lockdown with a patented and upgraded auto-latch locking system.
  • FITS TIGHTER TO KEEP WATER OUT | Improved seals and all-new tight-fit clamps provide state-of-the-art weather protection.
  • PROVEN FOR EXTREMES FROM ALASKA TO FLORIDA | Tested in the harshest conditionsfrom -40 to 180F and zero to 95% humidityand guaranteed by a 5-year warranty.
  • NO WASTED BED SPACE, PARKED OR DRIVING | 100% bed access. All the time. Simply fold to the cab, easily secure, and safely drive with the cover fully open.

Description

America’s best-selling truck bed cover just got even better.Introducing the BAKFlip MX4 Gen 3—the latest evolution of RealTruck’s most popular tonneau cover. Now better than ever, the BAK has redesigned the for improved strength, security, and all-weather performance. The Gen 3 MX4 features alloy-based construction, including heavy-duty aluminum side rails and top panels, reinforced with high-density polymer cores. This updated design delivers a 22 percent increase in strength over the previous generation, making it even more capable of handling daily use, heavy loads, and harsh environments. Security has also been upgraded. BAK’s patented auto-latching system secures the cover automatically when closed. Newly engineered lock components provide added resistance to tampering and forced entry, allowing you to transport your gear with confidence. In rough weather, the Gen 3 MX4 holds strong. Revised EPDM perimeter seals and tight-fit clamps offer the best seal yet, helping prevent water intrusion along the bed rails. A longer dual-action tailgate seal weatherproofs the tailgate while preserving full functionality, whether the cover is open or closed. While the MX4 is built tough, it doesn’t compromise on looks. The flush-mount design gives it a sleek, low-profile appearance, while a textured matte-black finish across all surfaces delivers a clean, subtle aesthetic. Installation is easier than ever with a new click-in rail system that cuts install time by up to 12 percent. Day-to-day use is just as simple—drop the tailgate, unlatch, and fold the cover forward. For complete bed access, fold the cover against the cab without blocking your third brake light. The BAKFlip MX4 Gen 3 is proudly assembled in Missouri using globally sourced materials and backed by a 5-year warranty.

Brand: RealTruck


Style: BAKFlip MX4


Exterior Finish: Aluminum


Material: Aluminum


Lock Type: Tailgate


Brand: ‎RealTruck


Style: ‎BAKFlip MX4


Exterior Finish: ‎Aluminum


Material: ‎Aluminum


Lock Type: ‎Tailgate


Manufacturer: ‎BAK


UPC: ‎192631020424


Automotive Fit Type: ‎Vehicle Specific Fit


Global Trade Identification Number: ‎24


Model: ‎448130


Item Weight: ‎71 pounds


Product Dimensions: ‎68 x 23 x 8 inches


Item model number: ‎448130


Is Discontinued By Manufacturer: ‎No


Manufacturer Part Number: ‎448130


Date First Available: August 23, 2018


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Wednesday, Mar 25

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

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Leasing options through Acima may also be available during checkout.

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Similar Products

Top Amazon Reviews

    • Well built, tight fitting and low profile
Style: BAKFlip MX4 Size: 5' 10" Bed
Impressed with the design on this. Its low profile, fairly easy to install. Make the truck look good. I gave it 4 out of 5 on installation due to i needed another body to help hold a corner down to have it sit right for bolt down. Even that, wasnt difficult at all. RTFM and golden. I tested it thru many a carwash (Crew Carwash) which has high pressure. Hardly any water gets in. Little by the tailgate. We'll see how it holds to sun damage/coloration and the weather. I personally think it will do well! Foldup: This is a must if you use the bed for hauling things. This top folds ups nice and easy. Simple pull down on the cable and flip it over! The mfg states it can hold up some weight. I'm not going to try it unless I have to. I trust what they say. Its a solid top. If you are thinking on this one, dont hesitate! ... show more
Reviewed in the United States on December 13, 2023 by Rmelmax
    • Bakflip mx4 sets the standard
Style: BAKFlip MX4 Size: 5' 10" Bed
Bakflip sets the standard. Easy to install. Nice unit. I wouldn’t say it creates a water proof space especially with a gmc multipro tailgate. But the bed remains mostly dry. I do think they are overpriced but it is what it is. The first one a got a few years ago was about $850 and I think that’s a fair price. Still it’s a very nice unit and easy to open and store. ... show more
Reviewed in the United States on January 14, 2026 by R8toactive
    • Very happy with product
Style: Folding Size: 5' 10" Bed
Said it would ship to door in 1 business day but not true. Looks like its going to mess up my plans a little as I was going on a trip I bought this for. Havent received product yet so this is not a review on actual item. Update: even though it said it just shipped and no tracking was available beyond that, it showed up the next day so it did get here only a day late which was soon enough. As far as product goes, super nice and easy install. Great packaging. Instructions have to be pulled online but its real easy to follow. ... show more
Reviewed in the United States on March 10, 2026 by Josephrd
    • Folding bed cover
Style: BAKFlip MX4 Size: 5' 10" Bed
Was ez to install .. fit .. looks good.. works
Reviewed in the United States on January 13, 2026 by Larry S.
    • Is it worth the $1200? Seems like it so far!
Style: Revolver X4s Size: 5' 10" Bed
I have a 2022 Chevy Silverado that I wanted a bed cover for. After much research, I decided on the BAK Revolver X4s. I wanted a hard cover, a roll up, and it fit both. Upon installing it, I opened the factory box and it was packaged perfectly. Easy to unpack. Watched a YouTube video to confirm installation procedures. It went on with almost no issues. The unopened box is somewhat heavy. And after getting the bedside rails on the cover itself is heavy. Help was nice getting it on the rails so as not to scratch or dent any body panel areas. A couple of adjustments to fit correctly and about an hour later it was on and working perfectly. The cover is awesome. Install was straight forward. I gave four stars because I dont know how it will do long term. And I also wasnt a fan of the plastic knob type nuts they used to tighten the cover to the rails at the front of the bed. Very hard to get tight. And the price is well, kinda pricey at $1200ish. I dont have regrets so far, seems like a great quality unit. Open and locks perfectly. I could easily give this five stars but again, I'm not sure what long term has in store for this cover. Time will tell. So far though, if you're looking for a quality hard roll up cover and dont mind spending the money, this seems to be an great one! ... show more
Reviewed in the United States on February 25, 2026 by Miss Jenny
    • Smooth install and quality product for my 2023 Silverado
Style: BAKFlip MX4 Size: 5' 10" Bed
First, I spent a fair amount of time doing research for a decent tonneau cover. When I purchased my truck, I knew I needed a tonneau cover. I initially was leaning toward a retractable-style cover for a couple of reasons. One - I wanted something that would make my bed both secure and dry. Two - I wanted something that would be out of the way when I needed the full bed and was electric actuated. Third - I was fairly certain I wanted something constructed of metal rather than plastic or vinyl. There was one issue with electric retractable tops is they are VERY expensive! So, eventually I had arrived at the conclusion I just didn't want to spend the money for a retractable top, but wanted the sturdiness of a metal retractable top. BakFlip hits 2 of my 3 asks for a tonneau cover - AND at a fraction of the cost! So, this is MY comparison contrast between retractable vs folding tonneau covers. Next, when it arrived, it was packed very securely. I was a bit worried after I had ordered because I had read some reviews that indicated their cover was damaged during shipping. The box was large and bulky, but wasn't unmanageable. My 17 year old daughter actually got it into the house just fine on her own. Installation. My advice on installation is to unwrap the cover and brackets and separate the hardware into piles (nuts, washers, lock washers). The other reviews on here are spot-on! If you are like me and you're a garage 'tinkerer' with cars and trucks and know your way around a toolbox, you will have no problem with the install. It took me about an hour. Just be sure, to pay attention to the alignment and insure the brackets are grabbing your bed rails squarely. Definitely worth going back around to give the bolts a final 'snug' when you're done. Performance. I saw mixed reviews on here that were indicative of the cover leaking. The cover (so far) has kept the gear in my bed dry during the handful of rainstorms we've had since the install. As for the dust? Here's the thing. When you put one of these covers on, you are sealing around the top of your bed. The penetrations and voids UNDER that cover will allow dust (and in most cases water). How is it the tonneau cover's fault? Get creative if you want your bed to be air-tight. Overall, I am pleased with this purchase. In the end I am happy that I decided to save about $1600 because, as it turns out, I don't think having a remote and being able to click a button to retract the cover is worth an extra $1600. I hope this review helps if you are on the fence like I was... ... show more
Reviewed in the United States on June 21, 2023 by Bryce P.
    • Don't waste your time
Style: BAKFlip MX4 Size: 5' 10" Bed
Don't waste your time. Installed on a GMC Sierra AT4X. I have installed several covers and usually this is a good brand but this was junk! The rails went on fine and I always expect some adjustment of brackets to get the fit just right but this took me forever to get the driver side to latch properly. I did finally get it to latch but as I was doing a few open and close test I dropped down the last panel and the corner piece of plastic broke off. I am sure they would replace it but why have such a weak point at the corner like that. I am also not a fan of how the back fits over the tail gate, maybe mine specifically just had weirdly bent rubber that would smooth out over time but as it closed the first few times it was far from water tight. I have usually had good luck with Bakflip but for this truck I am looking elsewhere. ... show more
Reviewed in the United States on March 19, 2025 by Derek W

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