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Warehouse Direct Prices On BAK Industries Tonneau Covers By Cutting Out The Middle Man 

80135 – Revolver X4s – Fits 2019-2021 GMC Sierra 1500 5′ 9″ Bed (Carbon Pro Bed)


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The Revolver X4s has new features, including matte black aluminum underbody, integrated safety slat caps, rear corner caps, and more. Other Revolver X4s features include industrial-grade vinyl and matte finished seals and side rail extrusions.  

EXPECT MORE with Revolver X4s: 

  • NEW Matte black aluminum under body and clamps for a sleek, stylish appearance 
  • NEW Side rail seals with smooth flat design 
  • NEW Durable strap and buckles to secure the open cover while driving 
  • NEW Rear corner caps for a more modern appearance 
  • NEW Integrated bulkhead seal for superior sealing 
  • NEW Integrated safety slat caps for protection when rolling 
  • Matte finished, industrial-grade vinyl that keeps water out 
  • Full access to stake pocket holes for additional accessories 
  • Patented rotational locking rails that secure the full length of the bed 
  • Automatic latch secures easily and releases from either side of the bed 
  • 5-year warranty 


The Revolver X4s is a bed cover engineered for real-world durability with a modern, stylish appearance. It has top-to-bottom, matte-black finishes to every aspect of the truck bed cover paired with one-of-a-kind details that set it above the rest. It a premium option that offers dependable bed protection when cover is closed, and complete bed access when opened. The Revolver X4s has a flush appearance and is backed by a 5-year warranty.  

Customer Reviews

Based on 27 reviews
Bobby Whitaker
Beautiful, sleek cover

This tonneau cover is excellent! It looks stunning the way it sits so flat and smooth over the bed. It roles up very easily. I love the way I can still see out the back window when it is rolled up. I was a bit worried about how smooth it would look given that it's a bunch of slats, but it looks like one big sheet, perfectly smooth. The customer service is great. There was one little plastic piece that was broken (and I think I accidentally did it when I took it out of the box). They immediately shipped me a replacement piece, no questions asked. Everything about this transaction, the company, and the cover is a perfect ten in my book.


great company with good price bed cover fit very good love it would use this company again

Christopher Ferris

So far so good, easy install. Only time will tell on quality.

James Whittaker
Great looking

Received my cover in about a week. Installation was straight forward directions were spot on. My son has the backflip on his truck which got me to looking at the revolver X4s.

Desert Diva
The perfect cover

This Cover is awesome & super easy to install. Works Perfectly. Special Notes if you have the factory track system. You will meet to buy 10 metric screws to install the track to the aluminum fixtures provided. These can be 6mm socket head cap screws by 16mm long because the factory bolts are too long and will hit the body. Secondly the plastic end cas to the cover don’t have a good secure connection other than flimsy flexible snap in. To avoid them coming off purchase 1/4-20 by 1/4 stainless set screws and install them into the open space with a little clear silicone and they will not come out. Excellent for the money. .

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