MOC: Optimus Prime Trailer / Combat Deck - Full Reveal and Overview

Reddit user sandwiched has proudly revealed a custom LEGO creation (MOC) featuring a Generation 1-style trailer and combat deck designed specifically to accompany the official set 10302 Optimus Prime. Developed over a two-year period, this impressive project draws heavy inspiration from the classic G1 toy while aiming for a more realistic aesthetic. The builder addresses a personal grievance with the original vintage toy's design—specifically the inaccurate rear ramp—by engineering proper, functional rear doors complete with working locking rods and USDOT-style lighting and conspicuity markings.

The physical build underwent three major structural revisions to correct real-world stability issues that only became apparent after transitioning from digital designs to actual bricks. Inside, the trailer abandons traditional G1 decorative stickers in favor of fully realized utility, featuring custom-designed racks, receptacles, and mount points to securely hold almost all of the accessories included with set 10302 Optimus Prime, omitting only the information plaque. In its deployed Combat Deck mode, the build incorporates the iconic Roller, a turret and repair drone, and a miniaturized computer system dubbed Teletraan 0.5.

To round out the authentic G1 experience, the creator also custom-built minifigure versions of the human characters from the original animated series: Chip, Sparkplug, Spike, and Carly, addressing the lack of minifigures in the original 10302 release. The trailer design further boasts extended side stabilizers and a functional vehicle loading ramp set to an 18-degree incline.

Fan projects like this showcase the incredible dedication of the LEGO community in expanding upon official releases. If you are inspired to build your own custom Transformers displays or manage large MOC projects, you might want to pick up a LEGO storage box to keep your spare elements organized, or grab a brick separator to make modifying your builds easier.