Addpex - OLD ImpulseRC Apex Rear-Bumper for Vista/O3/O4/Walksnail FPV

After building and refining my front bumper for over 3 years and 25+ versions, I realized something was missing: rear protection. Especially for those who fly backwards, do Matty flips, or send it through tight gaps – the rear of the frame takes just as much abuse.

So here’s the Rear Bumper, designed specifically for the ImpulseRC Apex – to protect the top and bottom plates, guard your VTX and antenna, and absorb impact where it matters.
🧩 Key Features

📦 Protects both top and bottom plates – especially useful for reverse tricks and hard landings
🔁 Optimized for Matty-style flying – no more cracked carbon after backward impacts
📡 Side-mounted antenna protection – no direct impact
📶 VTX is soft-mounted – clamped between bumper arms without screws
🔒 No tools needed – plug & fly
🧽 Shock-absorbing by design – made to flex, not break
🧰 Fully 3D-printable at home – no special gear required
🤝 Designed to complement the front bumper – complete crash system for your Apex

🔬 Design Story

This rear bumper was the logical next step after finishing the front. I noticed that backplate damage and antenna breakage were becoming a pattern – especially when flying in reverse or bouncing off walls.

🤝 For the Community

Like the front bumper, this one is completely free – because good design should be shared.
Print it, remix it, abuse it. If you’ve got suggestions or improvements – I’d love to hear them.
Let’s keep pushing FPV forward – one crash at a time.

Fly it backwards. Land it hard. Break less. ✌️