RadioMaster GX15 and GX15 MAX: ELRS Radio Features & Upgrades
RadioMaster GX15 and GX15 MAX: ELRS Radio Features & Upgrades
The RadioMaster GX15 is the newest 2.4GHz ExpressLRS radio in RadioMaster’s GX line, built for pilots who fly RC airplanes, gliders, helicopters and other traditional aircraft. It pairs a fast STM32 H7 processor, a top-mounted 3.5-inch IPS touchscreen and V6 Hall-effect gimbals with dual built-in 2.4GHz ExpressLRS (Gemini) transceivers, so you get a clean antenna-free look and reliable long-range control. If you want the highest-spec version, the GX15 MAX adds AG02 CNC Hall gimbals and premium aluminum controls for about $50 more. CSKYUAV carries the GX15 Radio Controller, the GX15 MAX Radio Controller and a full range of genuine GX15 accessories — replacement cases, leather and soft-rubber grips, CNC upgrade parts and more — so this guide walks through what the GX15 does, what MAX adds and which accessories are worth buying.
What is the RadioMaster GX15?
RadioMaster introduced the GX15 as the next step in its GX radio family. Where earlier GX models such as the GX12 are dual-band controllers, the GX15 is a dedicated 2.4GHz ExpressLRS transmitter aimed squarely at traditional aircraft pilots — fixed-wing models, gliders and helicopters — who want precise stick feel and a clean, low-drag radio that is easy to hold during long flights.
Under the shell you get a high-performance STM32 H7 processor, which makes EdgeTX feel smoother, scripts run faster and model switching almost instant. Two Semtech SX1281 transceivers, each running at 250mW, deliver dual 2.4GHz ExpressLRS Gemini performance with ultra-fast update rates, including F1000 operation when paired with a compatible receiver. A built-in gyroscope even allows tilt-based control inputs, and the internal microphone is reserved for future features. The top-mounted 3.5-inch IPS touchscreen (480 × 320, 262K colours, up to 600 nits) keeps telemetry, timers and flight data visible without your hands blocking the display.
GX15 vs GX15 MAX: what does the extra budget buy?
Both radios share the same core — the STM32 H7 processor, the dual 2.4GHz Gemini ExpressLRS link, the 3.5-inch touchscreen and EdgeTX firmware (version 2.12.0 or higher). The GX15 MAX upgrades the parts you actually touch:
| Feature | RadioMaster GX15 | RadioMaster GX15 MAX |
|---|---|---|
| Price (CSKYUAV) | $199.99 | $249.99 |
| Gimbals | V6 Hall-effect sensor gimbals | AG02 CNC Hall-effect gimbals with M4 stick ends |
| Controls & finish | Standard plastics | Premium aluminum controls and refined finish |
| Colours | White / Yellow / Red / Green / Blue | Black / Transparent Charcoal / Red / Gold / Blue |
| Included extras | Standard accessory set | MAX signature carry case, extra shoulder panels, low-tension springs, screen protector |
| Core hardware | STM32 H7, dual SX1281 2.4GHz Gemini ELRS, 3.5″ IPS touchscreen | Same platform (identical core performance) |
For most fixed-wing and glider pilots the standard GX15 with its V6 Hall gimbals is already a step up in precision. Buy the GX15 MAX if you fly competitively, want the feel of AG02 CNC gimbals and aluminum controls, or simply want the signature carry case and extras in the box.
Making the GX15 yours: colours, grips and CNC parts
The GX15 is designed to be personalised, and RadioMaster sells genuine shells and grips that swap in minutes. If you want a new look, the GX15 Front / Rear Case is available in carbon fibre, transparent charcoal and a full colour range from black and white to red, yellow, blue and green — most front shells around $15.99, rear shells from $9.99. For better grip in the hands, the GX15 Side Grip Set comes in leather or soft rubber with your choice of stitching colour (black, red, yellow or blue), from $3.99 to $8.99. To complete the premium look, the GX15 CNC Upgrade Parts kit adds machined aluminum accents in black, blue, red or gold at $39.99.
Practical GX15 upgrades for daily flying
Several genuine accessories improve how the radio feels and sounds in everyday use. Pilots who want a spare or replacement screen keep a GX15 Screen Protector on hand — the 3.5-inch touchscreen is the part you look at most. The internal low-noise cooling fan can be refreshed with a spare GX15 Fan, and a spare speaker module keeps telemetry voice prompts loud and clear. If you want to tune stick feel, a GX15 Spring Bag gives you replacement springs to adjust gimbal tension, while switch and button spares — such as the plastic button kit and plastic handle — let you refresh worn parts after heavy use. Antenna spares such as the GX15 2.4G Antenna Kit and antenna plug covers add redundancy for long-term owners, and the cheap GX15 Screw Set ($1.99) is the one spare every pilot should own.
Protecting the radio between flights
A transmitter lives in a bag as much as in your hands. The GX15 Carry Case at $24.99 is a fitted hard case that protects the gimbals, screen and switches in transit — and GX15 MAX owners get the signature case bundled with the radio. Between flying sessions, storing the GX15 with sticks centred and a screen protector fitted keeps the controls accurate season after season.
Frequently Asked Questions
Is the RadioMaster GX15 compatible with ExpressLRS receivers?
Yes. The GX15 has dual built-in 2.4GHz ExpressLRS (Gemini) transceivers based on two SX1281 radios at 250mW each, and it supports ultra-fast ELRS update rates including F1000 with compatible receivers. It runs EdgeTX 2.12.0 or higher and pairs with any standard ExpressLRS 2.4GHz receiver.
What is the difference between the GX15 and the GX15 MAX?
The core electronics are identical, but the MAX upgrades the physical controls: AG02 CNC Hall-effect gimbals with M4 stick ends instead of V6 Hall gimbals, premium aluminum controls, a different colour range (black, transparent charcoal, red, gold, blue) and extra items in the box such as the signature carry case, additional shoulder panels and low-tension springs. The MAX costs about $50 more.
Can I change the colour or look of my GX15?
Yes. Genuine RadioMaster parts let you replace the front and rear shells (carbon fibre, transparent charcoal or solid colours), swap the side grips between leather and soft rubber with different stitching colours, and add CNC aluminum upgrade parts in black, blue, red or gold.
GX15 or GX12: which RadioMaster radio should I choose?
It depends on how you fly. The GX15 is a clean 2.4GHz ExpressLRS transmitter optimised for fixed-wing, glider and helicopter pilots. If you fly long-range FPV multirotors and want a dual-band controller, the GX12 supports 2.4GHz plus a sub-G 900MHz band on its Gemini-X link — see our RadioMaster GX12 guide for a full look at that ecosystem.
Where can I buy genuine GX15 accessories?
CSKYUAV stocks the RadioMaster GX15 and GX15 MAX radios together with authentic GX15 spare parts and upgrades — CNC parts, shells, side grips, antennas, fans, speakers, buttons, springs, screen protectors and the carry case — with shipping options for European and Russian customers.
Conclusion
The RadioMaster GX15 brings modern ExpressLRS performance, an STM32 H7 core and a bright 3.5-inch touchscreen to pilots of traditional aircraft, and the GX15 MAX adds the AG02 CNC gimbals and premium controls for those who want the top configuration. Whatever you choose, genuine spare parts and upgrades keep the radio feeling new for years. Browse the GX15 Radio Controller, compare the GX15 MAX, and pick your colour and accessories on the CSKYUAV store — our team can also advise on bundles for European and Russian pilots.