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UnderCover SwingCase Review 2026 — Full Specs, Honest Cons, All Fitment Codes

By Cole Briggs, Founder & Editor —

UnderCover SwingCase truck bed storage box mounted on a truck bed rail, lid closed
Image: UnderCover / RealTruck Group

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Our Verdict

8.2/10
Best Swing-Out Pick
The UnderCover SwingCase is the best swing-out truck bed storage option for most users: fast install, tonneau-compatible, 1.5 cu ft at 75 lbs capacity, and a 180° swing that stays completely out of the way when open. The trade-off is ABS plastic construction and a 1-year warranty — buyers who need steel-level security should compare against crossover toolboxes.

Score: 8.2/10 — composite of install simplicity, capacity for use case, durability evidence, 3-year value, and fit for most users. Methodology →

UnderCover SwingCase Specifications

UnderCover SwingCase full specifications
SpecValue
MaterialABS plastic (UV-resistant, rust-proof)
Capacity — weight75 lbs
Capacity — volume1.5 cu ft
Dimensions34 × 16 × 8.5 in (L × W × H)
Swing range180° (opens flush to bed wall)
LatchQuick-release latch + twist lock + padlock hasp
SealMoisture/perimeter seal
Install hardware6 self-tapping screws (included)
Install timeUnder 20 minutes
Tonneau clearance needed3 inches minimum
Sides availableDriver side + Passenger side (sold separately)
OriginMade in USA
Warranty1 year
Price range$189–$299 (typical: $219.99)
Owner rating4.6/5 — throtl (212 ratings)

📅 Prices verified November 2026. Amazon prices change — click through for the current price. Buying through our link costs you nothing extra.

Pros and Cons

Pros

  • Under-20-minute install with 6 self-tapping screws
  • 180° swing clears the bed entirely when open
  • Compatible with most soft and hard tonneau covers (3 in clearance needed)
  • Moisture and perimeter seal keeps contents dry
  • Removable tray and cup holders for organisation
  • Made in USA

Cons

  • ABS plastic limits security versus steel crossover boxes
  • Blocks one tie-down anchor on most beds
  • Buying a pair reduces usable bed width
  • 1-year warranty versus lifetime on some steel competitors

What Fits Inside a SwingCase

The 1.5 cu ft and 75 lb capacity is well-suited for everyday truck carry items. Owner reports and forum discussions confirm the following typically fits well:

  • Hand tools: screwdrivers, wrenches, pliers, ratchet sets, hex keys
  • Recovery gear: tow strap, shackles, recovery boards (one, compact)
  • Jumper cables — standard 20-ft set fits with room remaining
  • First aid kit (vehicle-size), gloves, rain poncho
  • Tailgating: bottle opener, folding utensils, napkins, small cutting board
  • Chain and lock (lightweight)

What does not fit well:

  • Power tools (drill, impact driver) — too wide for most configurations
  • Air compressor (portable) — too deep for the 8.5 in height
  • Multiple sets of tools — 1.5 cu ft fills fast

How to Install the SwingCase

The SwingCase uses six self-tapping screws that thread directly into the bed rail. No additional brackets, no bed-floor drilling, and no professional installation required for most trucks. The key steps:

  1. Remove any bed liner or mat material from the mounting area on the rail (the screw flanges need clean contact)
  2. Hold the bracket assembly against the inside of the bed rail at the wheel-well area and mark the six screw holes
  3. Start all six screws by hand before tightening — this ensures alignment before committing any single screw to full depth
  4. Tighten evenly. Do not overtorque — ABS flanges can crack if over-driven
  5. Attach the box to the bracket pivot and test the 180° swing range for clearance

For a complete step-by-step install guide with tool list and torque notes: SwingCase Install Guide →

UnderCover SwingCase swung open 180 degrees showing the interior storage tray
Image: UnderCover / RealTruck Group

Tonneau Cover Compatibility

The SwingCase is compatible with most soft and hard tonneau covers provided there is at least 3 inches of clearance between the closed cover and the top of the installed box. The box sits low against the bed wall — well below the level of most tonneau covers when closed.

Confirmed compatible brands (from owner reports and UnderCover's own guidance):

  • BakFlip — all current MX4, F1, G2 models: confirmed compatible with standard clearance
  • Extang — Solid Fold, Trifecta: confirmed compatible
  • Retrax — PowertraxONE, RetraxPRO: check clearance on your specific truck — some cab/bed combos are tight
  • Soft roll-up covers — generally compatible; roll-up position adds clearance when accessing the box

For a full compatibility matrix by brand and model: SwingCase Tonneau Cover Compatibility Guide →

SwingCase vs Competitors

The SwingCase occupies a specific niche: swing-out, tonneau-compatible, fast install, moderate capacity. Here is how it compares against the main alternatives at each decision point.

SwingCase vs crossover toolbox vs DECKED vs wheel-well box
Storage TypeCapacitySecurityTonneau?Install TimePriceWarranty
UnderCover SwingCase1.5 cu ft / 75 lbsABS + padlock hasp✓ (3 in clearance)Under 20 min$189–$2991 year
Crossover toolbox (UWS, Dee Zee)10–18 cu ftAluminum + cam lock✗ Not compatible30–60 min$249–$6993–lifetime
DECKED drawer system2× 200 lb drawersSteel + lock✗ Requires removal3–6 hrs$1,299+3 years
Wheel-well toolbox (Weather Guard)1–2 cu ftSteel + padlockVaries30–45 min$199–$399Varies

Full side-by-side: SwingCase vs Crossover vs DECKED — Detailed Comparison →

SwingCase Fitment Codes by Truck

Each SwingCase unit is specific to a truck make, year range, and side. Use the model code when ordering — the wrong code will not fit your bed rail geometry.

SwingCase model codes by truck make and side
TruckDriver-Side CodePassenger-Side CodeYears Covered
F-150SC201SC2032004–current
MaverickVerify on fitment toolSC2072022–current
Ford Ranger (2019–2023)SC206Verify2019–2023
Ford Ranger (2024+)SC209Verify2024+
Silverado / Sierra (standard)SC100SC1012019–current
Silverado / Sierra (short bed)SC103SC1042019–current
Sierra DenaliSC105—Check fitment tool
RAM 1500 / 2500SC300SC3012009–current
RAM 2500/3500 HDSC302SC304Check fitment tool
TacomaSC400SC4012005–current
TundraSC400SC4042007–current
Frontier / TitanSC500SC502/SC503Check fitment tool
GladiatorSC300SC3012020–current (shared with RAM)
Colorado / CanyonSC103 / SC107SC104Check fitment tool

Model codes and year coverage change. Verify your exact year and bed configuration on UnderCover's official fitment guide before ordering. Fitment pages on this site cover each truck in detail.

F-150 & Maverick fitment Ranger fitment Silverado & Sierra fitment RAM fitment Tacoma fitment Tundra fitment Gladiator fitment Frontier & Titan fitment Colorado & Canyon fitment

Where to Buy the SwingCase

The SwingCase is available through Amazon (Prime-eligible), RealTruck, and direct from UnderCover. Amazon typically has the widest selection of model codes and the fastest delivery. Price range: $189–$299 with the typical unit around $219.99. Price varies by model code — short-bed and specialty codes sometimes differ.

Check Current Price on Amazon →

📅 Prices verified November 2026. Amazon prices change — click through for the current price. Buying through our link costs you nothing extra.

Frequently Asked Questions

What is the UnderCover SwingCase made of?
The SwingCase is made of ABS (Acrylonitrile Butadiene Styrene) plastic — the same material used in automotive interior panels. ABS is UV-resistant, rust-proof, and impact-resistant for everyday use. It is lighter than steel or aluminum toolboxes. The trade-off is that ABS will flex and can be forced open with enough leverage — it is not a security vault. The twist lock and padlock option adds a deterrence layer but the material itself is not theft-resistant.
Does the SwingCase block bed access?
No — the 180° swing moves the door completely clear of the bed when open. In the open position the door rests parallel to the bed side. You retain full bed access. When closed, the box sits within the wheel-well area and does not block the center of the bed. The one access restriction is the tie-down anchor directly behind the mounting bracket — that anchor is blocked on most trucks when the SwingCase is installed.
Can I install two SwingCases on the same truck?
Yes — a driver-side and passenger-side unit can both be installed on the same truck. Buying a pair doubles your storage to 3 cu ft at 150 lbs total. The trade-off is reduced usable bed width: two installed boxes narrow the working floor of the bed by the combined depth of both units. On a standard-bed F-150 this is noticeable when hauling wide items.
What is the difference between SwingCase model codes?
UnderCover uses model codes (SC100, SC201, SC300, etc.) to indicate truck fitment and side. The first digit indicates the truck line: 1xx = Silverado/Sierra, 2xx = F-150/Maverick, 3xx = RAM, 4xx = Tacoma/Tundra, 5xx = Frontier/Titan. Odd codes are typically driver side; even codes are passenger side — verify on UnderCover's fitment tool for your specific year and cab. Bed length (short-bed vs standard-bed) can also affect the code.
How does the SwingCase lock?
The SwingCase has three locking layers: (1) a quick-release latch that opens without a key — fast access, no theft protection; (2) an integrated twist lock that requires turning the latch mechanism — deterrence against casual access; (3) a padlock hasp that accepts a padlock (not included) for higher security. Most owner reports use the twist lock for everyday use and the padlock only when the truck is parked long-term. The ABS plastic body means lock strength is limited by the material regardless of the lock used.
Is the SwingCase watertight?
The SwingCase has a moisture perimeter seal around the door — it keeps rain and road spray out in normal conditions. It is not submersion-rated and is not designed to sit in standing water. Owner reports confirm it performs well in rain and car-wash scenarios. If the truck bed floods (e.g. driving through deep water or pressure-washing the bed directly into the box area), water can get in around the mounting point. Do not store electronics or items sensitive to humidity long-term without a secondary barrier.
Where is the SwingCase made?
The UnderCover SwingCase is made in the USA. UnderCover is an American manufacturer based in Texas. The Made in USA origin is noted on product packaging and in warranty documentation.