Lion Knights' Castle 10305 Icons: Complete Build, Display, and MOC Expansion Guide
The Lion Knights' Castle 10305 Icons is 4,514 pieces of fully compatible medieval fortress architecture. This guide covers the complete build breakdown, interior room access, the worm-gear drawbridge mechanism, display requirements, and how to extend the set with MOC terrain and faction expansions.
Build Specifications
Verify your workspace and shelving before ordering. The 10305 is among the largest castle builds in the standard brick system.
Piece Count
4,514 pcs
Dimensions (Closed)
38cm H × 44cm W × 33cm D
Dimensions (Open)
Expands to 68cm wide
Minifigures
22 (Lion Knights + Black Knights)
Target Builder
Adult 18+, Intermediate–Expert
Compatibility
100% standard brick system
Architectural Breakdown
The 10305 uses a modular hinge system. The structure opens fully for interior access and closes for a 360-degree exterior display. Each zone below is a self-contained build phase.
The Gatehouse
Fully functional portcullis with integrated drawbridge mechanism. Counterweight systems operate via external gear knobs. Chain links secure the primary entry. The worm gear prevents free-fall when the bridge is released — a direct application of gear ratio physics to structural safety.
The Armory and Dungeon
Underground holding cells feature breakout wall panels. The armoury includes weapon racks, shields, and halberds matching the legacy Lion faction crests. SNOT (Studs Not On Top) techniques create the cobblestone floor texture — the same method used in the Stuttgart Station set and the medieval building blocks guide.
Living Quarters and Kitchen
Interior rooms stack vertically. The kitchen includes a brick-built oven, water wheel milling mechanism, and storage casks. Royal chambers feature decorative tiling and a hidden escape route behind the bookcase wall panel.
The Towers
Four round towers with hollow shafts allow aftermarket LED cable routing. Each tower terminates in crenellated battlements with flag banner mounts. The tower connection to the main wall uses Technic pin reinforcements to handle the vertical load without warping.
The hinge system opens the castle to 68cm wide, exposing all interior rooms across four vertical levels.
Engineering and Build Techniques
The kinetic elements in the 10305 apply real STEM principles. Understanding the mechanics before you build prevents errors at the structural stages.
Worm Gear Drawbridge
The drawbridge uses a worm gear ratio to prevent free-fall when released. The gear knob on the exterior wall advances the worm, which rotates the chain drum one notch at a time — no spring tension required.
Hinge Alignment
A-frame construction requires exact plate alignment so the two castle halves close seamlessly. Misaligned plates at the hinge joint stress the baseplates over time. Test the hinge closure at bag 4 before continuing to the towers.
Archway Structural Integrity
Archways use overlapping masonry bricks and Technic pin reinforcements to manage the compressive load. Do not skip the pin steps — they prevent lateral wall drift on the portcullis frame.
Display and Storage Requirements
The 10305 weighs approximately 4.5kg assembled. Standard bookcase shelves will not support the open configuration. Plan your display infrastructure before the build is complete.
Closed Display
- Minimum 45cm width shelf clearance
- Minimum 15-inch depth clearance
- Reinforced shelf rated to 6kg minimum
- LED compatible — hollow tower shafts for cable routing
Open Interior Display
- Minimum 68cm width clearance
- Custom display surface or dedicated cabinet recommended
- Allow 5cm clearance either side for hinge swing arc
- LUMIBRICKS integration recommended for interior lighting
Community Expansion and MOC Customization
Adult collectors do not leave sets unmodified. The standard brick system supports large-scale MOC additions. Explore the medieval building blocks guide and the Spring Sale building blocks 2026 article for compatible expansion sets.
Terrain Expansion
Add 32x32 baseplates for moat extensions. River plates and muddy ground tiles connect directly to the castle base footprint. Irregular footprints require a custom surface area larger than a single standard baseplate.
Faction Army Building
Massing knight minifigures requires bulk accessory packs. The 10305 includes 22 figures but large-scale siege scenes demand 40+ figures. Alternative brick suppliers provide Lion and Black Knight faction figs in bulk.
Siege Equipment
Compatible with aftermarket trebuchet and battering ram MOC instructions. The standard connection system ensures all siege equipment integrates with the castle gatehouse and outer wall brackets.
The Morebybourn Commitment
Free Missing Parts
Zero missing pieces guaranteed. If a batch error occurs, replacement parts ship FREE to any address.
No Hidden Fees
The total billed at checkout is the final amount — inclusive of tax and tariff where applicable. No surprises.
Guaranteed Compatibility
100% fit with your existing standard brick collections. High-precision ABS molds with clutch power matching industry tolerances.
Build Do's and Don'ts
Do
- Sort all 4,514 pieces by numbered bag before starting
- Test the hinge closure at bag 4 before building towers
- Install all Technic pin reinforcements at the archway steps
- Pre-plan your display shelf before the build is complete
Don't
- Skip the worm gear steps — the drawbridge will free-fall
- Place on a standard bookcase shelf — 4.5kg requires reinforcement
- Force the hinge closed if it resists — recheck plate alignment at base
- Attempt to fit the open configuration on a single 32x32 baseplate
Ready to Build Your Kingdom?
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Order via WhatsAppFrequently Asked Questions
How long does the Lion Knights' Castle 10305 take to build?
Expect 12 to 15 hours for an experienced adult builder. Sorting the 4,514 pieces by bag number before you begin reduces total build time significantly.
Does the 10305 castle open for interior access?
Yes. The castle uses a modular hinge system that allows both halves to swing open to 68cm wide, revealing all interior rooms including the dungeon, armoury, kitchen, and royal chambers.
What shelving is required to display the Lion Knights' Castle?
You need a minimum 15-inch depth clearance. Standard bookcase shelves will not support the open configuration at 68cm wide. A dedicated display cabinet or reinforced shelf at 45cm+ width is recommended for closed display.
Are the alternative bricks from Morebybourn compatible with the original set?
Yes. Morebybourn uses high-precision ABS plastic molds with clutch power that matches standard industry tolerances. All bricks are 100% compatible with existing standard brick collections.
Can I expand the 10305 castle with MOC terrain and siege equipment?
Yes. The standard brick system supports 32x32 baseplate moat extensions, faction minifigure army builds, and compatible siege equipment including trebuchets and battering rams.