Tight Bore Designs

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Tight Bore Designs’ 3D printed miniatures products are perfect for use with Space Marines from Warhammer 40k, and compatible conversion bits / kits from STLs.

Latest Warhammer 40k Compatible 3D Printed Miniatures from Tight Bore Designs

Affordable New 40k Jump Pack Bits Let Your Primaris Fly!

Upgrade your Primaris Space Marines with Tight Bore Designs jump pack conversion bits, perfect for Warhammer 40k and Horus Heresy...

April 13, 2026 Read More →

New Mk6 Breacher Shields Bits space marines Tight Bore Designs!

Upgrade Your Space Marines: New Breacher Shield Bits

Saturnine is here! Get the Horus Heresy and 40k compatible MkVI, MkIII Space Marine breacher / boarding shield bits from...

April 16, 2026 Read More →

boarding shields bits on 40k primaris space marine model tight bore designs

New Boarding Shield Bits Give Primaris Marines a 40k Edge

Add brutal boarding action to your Primaris Marines with snap-on breacher shields conversion bits to make them hold any line.

April 16, 2026 Read More →

Upgrade Your Space Marine Tanks With These 40k Compatible Bits

Add more firepower to your Space Marine tanks with these new Warhammer 40k-compatible 3D-printed turret upgrades and canopy bits!

May 21, 2025 Read More →

Tight Bore Designs Conversion Bits Are Perfect For Space Marines

We've partnered with Tight Bore Designs to offer their alternative SM upgrades in our strong proprietary resin and offer great...

August 4, 2023 Read More →