Arrma Outcast 4S BLX Brushless RTR 1/10 Stunt Truck (Bronze) w/STX2 2.4GHz Radio

Arrma Outcast 4S BLX Brushless RTR 1/10 Stunt Truck (Bronze)
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Price: $399.99

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The Arrma Outcast 4S BLX Brushless RTR 1/10 Stunt Truck is equally suited to the trails, muddy fields, skate parks or race tracks. The OUTCAST 4X4 4S BLX shares the low, lean look of its 6S BLX forerunner in a scaled-down size. Power comes from the ARRMA 4S-capable BLX120 brushless system – which features a 2400Kv brushless motor and ESC fitted with dual EC5 connectors for using two 2S LiPo battery packs. Differential gears inside the front and rear gearboxes are made of durable metal.

Building from the successful 4X4 3S BLX platform, ARRMA designers stretched the track width for the OUTCAST 4X4 4S BLX by widening the suspension and drive shafts. A center brace added along the length of the chassis provides maximum durability and can be removed in just four quick steps when it's time to perform maintenance. The molded 16mm Big Bore shocks include top-loading springs and molded-in shock rod ends to prevent spring loss. The large, tough wheels hubs and durable 17mm wheel hexes hold standard 3.8" wheels, outfitted with low-profile BACKFLIP tires. 

The ready-to-run package comes complete with a Spektrum STX2 2.4GHz radio with SRX200 waterproof receiver and an ARRMA ADS-15M metal gear servo. Add your choice of battery, charger, and "AA" transmitter batteries, and start making your own RC mayhem!



  • ARRMA® speed and toughness
  • 4S-capable BLX120 Brushless Power System for 50+ mph speed
  • Performance approaching the OUTCAST™ 6S BLX 4X4
  • Spektrum™ STX2® 2.4GHz Radio System
  • 2-Channel SRX200 waterproof receiver *
  • Built-in 3-position throttle limiter
  • Extended range and interference-free performance
  • Throttle/steering reversing
  • Throttle/steering travel adjust
  • Throttle limiting
  • ADS-15M waterproof metal gear servo *
  • 2400Kv Brushless motor with large heatsink
  • BLX120 ESC with dual EC5™ battery connectors for two 2S LiPo packs
  • Lengthened suspension arms and driveshaft for wider track than 3S BLX vehicles
  • Center chassis brace for maximum durability
  • Metal spur gear and castellated slipper pads
  • Enlarged front and rear hubs for added strength
  • Durable 17mm hexes
  • 16mm Big Bore shocks with molded-in shock rod end and top-loading spring
  • Front and rear gearboxes with metal internal differential gears
  • Low-profile BACKFLIP tires
  • ADS-15M metal gear servo
  • 2-year limited warranty

*NOTE: For details on waterproof standards, please refer to the product instruction manuals.


Approximate Assembly Time: No assembly required
Ball Bearings: Transmission only
Batteries: One 3S, two 2S or one 4S hardcase LiPo battery (sold separately)
Body: Trimmed and painted molded polycarbonate
Bushing Material: Metal
Charger: Compatible with selected LiPo battery (sold separately
Chassis: Molded composite
Completion Level: Ready-To-Run
Differential: Oil-filled metal gear
Drivetrain: 4WD
Final Drive Ratio: 12.48
Front Shock Spring Rate: 0.8N/mm
Gear Pitch: 0.8 Module
Ground Clearance: 2.52" (64mm)
Height: 8.43" (214mm)
Internal Gear Ratio: 2.85:1
Length: 19.17" (487mm)
Max Battery Dimensions: 6.14 x 2.00 x 1.89" (156 x 51 x 48mm)
Motor Size: 3668
Motor Type: Non-sensored brushless, 2400Kv
Pinion: 13T
Radio: Spektrum STX2 2-channel included
Rear Shock Spring Rate: 0.7N/mm
Servos: Metal gear steering servo
Shock Type: Oil-filled, coil over spring
Size/Scale: 1/10
Speed Control: BLX120 w/dual EC5 battery connectors for two 2S LiPo packs
Spur Gear: 57T
Suspension: Independent
Tire Diameter: 6.06" (154mm)
Tire Tread: dBoots BACKFLIP LP
Vehicle Type: Monster Truck
Water-Resistant: Yes
Weight: 8.25lbs (3.75kg)
Wheel Diameter: 3.82" (97mm)
Wheel Hex Size: 17mm Hex
Wheel Type: MT
Wheelbase: 11.3" (287mm)
Width: 15.83" (402mm)

  • (1) ARRMA OUTCAST™ 4x4 4S BLX Vehicle with
  • (1) Spektrum SRX200 Waterproof Receiver (installed)
  • (1) ARRMA® ADS-15M Metal Gear Servo (installed)
  • (1) ARRMA® 4S-capable BLX120 Electronic Speed Control (installed)
  • (1) ARRMA® 4S-capable BLX3668 Brushless Motor (installed)
  • (1) Spektrum STX2® Transmitter
  • (1) Product Manual
Needed to Complete:
  • (1) 3S/4S or (2) 2S LiPo battery setup with EC5/iC5 connector
  • (1) Appropriate LiPo balancing charger
  • (4) AA batteries for transmitter

This product was added to our catalog on April 26, 2019

Verified Owner
Tuesday, May 21 2019 (about 2 years ago)
Arrma Outcast 4S BLX Brushless RTR 1/10 Stunt Truck (Bronze)
First of all, I have a granite 3s and a Kraton 6s and an outcast 6s, all awesome cars. I was a little disappointed at first with the release of this truck. So much plastic! One thing you have to remember is plastic flexes and is much lighter than metal. I was blown away with the out of the box performance. It is a dream on 4s! Double, triple backflips!!! Many bad landings and it just roars for more! It's great because it's bigger than the granite but not quite as big as the outcast 6s and is much lighter. It can take way more of a beating because of that. The body is very thick and has yet to show any wear even after my beating. The wing mount is incredibly durable. I landed right on that thing and it just keeps going with no damage. This manuevers way better than the granite 3s and rarely flips when turning. This is my favorite arrma yet! It is more durable and cheaper to run than the 6s models and destroys the competition of other brands. Please support arrma and buy one for yourself! I have been into RC for many years and they just keep improving their models and focusing on pleasing their customers. I own other brands as well and this truck has addressed all my needs in a basher. Durable, light, cheap to maintain, and a blast to drive. Buy one!!
Verified Owner
Saturday, May 30 2020 (about a year ago)
Arrma Outcast 4S BLX Brushless RTR 1/10 Stunt Truck (Bronze)
In one battery pack, front shocks are leaking pretty bad. Slipper clutch out of the box is very loose. Waiting to hear back from horizon hobby on the shocks.

All 4 shocks ended up leaking badly, (2-3 5000mah packs) horizon sent a rebuild kit for 2 shocks, I bought a kit and rebuilt all 4. I think they're good, but I only got 10 minutes into another pack before the slipper backed out, overheated, and melted the driveshaft. I check / adjust the slipper with every pack.

The truck is a blast to drive, 10/10 on performance. Overall durable (I do run rpm A arms) but if these issues keep coming up, it's going to be sitting.

If you don't know yet, the radio has a serious delay in the throttle / brakes and is a bear to drive if your used to a radio that is anywhere near responsive.
Verified Owner
Thursday, Feb 13 2020 (about a year ago)
Arrma Outcast 4S BLX Brushless RTR 1/10 Stunt Truck (Bronze)
This has to be the best budget rc on the market at this time. A set of rpm arms and it’s bulletproof and ready to bash, crash, wheelie, and just about anything you can throw at it literally. I’m kinda sold on this 4s line considering I have about $600 into upgrades alone to make my 6s kraton handle what this does with a set of front and rear rpm arms alone. Also probably one of my funnest rc vehicles to play with because it’s cheap enough not to care and you can just take it out on the truck and full send it every jump. A must buy for your collection. Just remember to throw away the junk transmitter and receiver that’s included
Verified Owner
Thursday, Jan 2 2020 (about a year ago)
Arrma Outcast 4S BLX Brushless RTR 1/10 Stunt Truck (Bronze)
My first RC truck....have several planes.
Has exceeded my expectations and I thoroughly enjoy this new hobby(habit)!!!!!!!!
Friday, Feb 12 2021 (7 months ago)
Arrma Outcast 4S BLX Brushless RTR 1/10 Stunt Truck (Bronze)
The best you can buy at this price point but they may never make them again mark my word's.
Verified Owner
Friday, May 29 2020 (about a year ago)
Arrma Outcast 4S BLX Brushless RTR 1/10 Stunt Truck (Bronze)
The rc has a ton of power and is a blast to drive when the pinion decides to stay on. The pinion has came loose 4 times in the 2 weeks that ive had it. I love the car but its super frustrating that I csnt drive it more than 10 minutes without the pinion coming loose.
Verified Owner
Saturday, May 23 2020 (about a year ago)
Arrma Outcast 4S BLX Brushless RTR 1/10 Stunt Truck (Bronze)
So far very happy. Insane little truck. Very fun r/c. Only complaint would be with
the cheap tools that it comes with.
Verified Owner
Wednesday, May 13 2020 (about a year ago)
Arrma Outcast 4S BLX Brushless RTR 1/10 Stunt Truck (Bronze)
I've had my new Outcast 4s for a few days now and it is so much fun! This is my 3rd Arrma and they build a very nice, quality product..Unfortunately since "spectrum" is the not a good transmitter it makes all the hard work Arrma does making a wiality product seem kind of for nothing.....Dump the spectrum controllers in ALL the line ups, your customers are getting sick of paying $425.00 and only getting a truck that still needs a controller, reciever and a servo that only works when it's moving! So, in completion I LOVE THE TRUCK and hate the transmitter, reciever and servo but after I buy a $30.00 reciever, transmitter and anoyher $30.00 on a servo I'll have exactly what I should have gotten in the first place....Whomever made the decision to add spectrum stx2 to the rtr kits should be fired, they are not in it to make customers happy or because they even care about the hobby..ANYONE who thinks the spectrum scx2 is good should just quit because they don't know squat! So my review is a complaint about cheap junk that corporate adds to an otherwise stellar product......Take your customers advise and you'll make a LOT more honest money and honest money LASTS....Eventually everyone is going to get sick of spending $60.00 to make a $200.00-$1300.00 kit drive right because some moran decided to use spectrum...
Verified Owner
Thursday, Apr 16 2020 (about a year ago)
Arrma Outcast 4S BLX Brushless RTR 1/10 Stunt Truck (Bronze)
I have been out of the RC Bashing game for a little while. Some years back I had several Traxxas vehicles, this is my first Arrma purchase. I am blown away by how well this truck is built, everything has been over engineered to take a beating. The first day out I ran it first on 3s just to see how manageable the power would be. The truck ran so well on 3s that it was hard to believe the truck had more. I ran a 3s 5000mah Spektrum LiPo for well over 30 minutes and still had plenty of power. On 3s the ESC and Motor barely got warm no matter how hard I beat on the truck. I gave the truck a good once over after the first 30 minutes to find everything was perfect. The next run was on a Ace 4s 5000mah pack, this thing is insane on 4s, the truck ran great and handled the power very well. I bashed this truck on and off the rest of the day going between 3s and 4s packs, I love the drivability on 3s and seemed to have more fun with the truck tamed down a little. I have been running the truck for a few weeks now everyday without one single problem. I would highly recommend this truck for anyone looking for a great all around, have a blast stunt/bashing truck. I look forward to adding some of the other Arrma vehicles to my collection.
Friday, Jun 14 2019 (about 2 years ago)
Arrma Outcast 4S BLX Brushless RTR 1/10 Stunt Truck (Bronze)
Keep your guard up on these trucks. The pinion may not be meshed correctly and need modifications. These share a lot of the same issues with the 3s trucks like leaky shocks to the point of being useless, a overly engineered and difficult motor mount and Rx Box design, a servo that is tested specs at 7.2v but run at 6v and is susceptible to glitching, as well as the possibility of needed upgrades rear driveshafts.