Mosasaurus (6721-1) is a Dinosaurs LEGO set released in 2001 with 27 pieces. Browse the parts list, minifigures, and verify loose bricks with our free scanner. Collectors browsing Dinosaurs sets use this inventory to verify loose parts, compare color variants, and read official build manuals without downloading PDFs. This set includes 19 unique part types.
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Buying checklist
Quick context before you buy this set used or verify a marketplace listing.
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Release year
2001 (25 years ago — may be retired)
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Catalog scale
27 parts listed · 19 inventory lines tracked
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Minifigures
No minifigs in inventory (brick-only or Technic set)
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Build manual
No digital manual in our catalog — check the box tab or LEGO.com
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Gray era
Pre-2004 set — may use old light/dark gray instead of bluish gray
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Shipping weight (est.)
~36 g for parts inventory (excludes box/minifig packaging)
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Before you buy used
Run the completion checker, compare photos to the inventory, and check live listings for sealed pricing
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Market value
No estimate on BrickID yet
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Parts in this set
19 parts · updating…
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Animal / Creature Body Part, Dinosaur / Dragon Arm, Left6128 · ×1 · Sand Blue -
Animal / Creature Body Part, Dinosaur / Dragon Arm, Right6127 · ×1 · Sand Blue -
Animal / Creature Body Part, Dinosaur / Dragon, Foot40393 · ×2 · Sand Blue -
Animal / Creature Body Part, Dinosaur Neck / Tail Ring40375 · ×2 · Sand Blue -
Animal / Creature Body Part, Neck / Tail, S Curve with Pin40396 · ×1 · Sand Blue -
Animal / Creature Body Part, Tail / Neck, Base Section with Black Pin40395 · ×1 · Sand Blue -
Animal Body Part / Plant, Tail / Claw / Horn / Branch / Tentacle, End Section40379 · ×1 · Sand Blue -
Animal Body Part / Plant, Tail / Neck / Branch / Trunk, Middle Section with Pin, Round Pin Hole40378 · ×1 · Sand Blue -
Animal Body Part, Alligator / Crocodile / Dragon Upper Jaw / Dinosaur Tongue6027 · ×1 · Red -
Animal Body Part, Dinosaur / Whale Flipper with Pin40386 · ×4 · Sand Blue -
Animal Body Part, Dinosaur Body Quarter with Pin Holes, Dark Gray/Sand Blue/Dark Blue/Red Print40374pr0003 · ×2 · Light Gray -
Animal Body Part, Dinosaur Body Quarter with Pin Holes, Dark Gray/Sand Blue/Dark Blue/Red Print40373pr0003 · ×2 · Light Gray -
Animal Body Part, Dinosaur, Back Sail 8 x 2 x 540385 · ×1 · Dark Gray -
Animal Body Part, Dinosaur, Head Toothed, Jaw Bottom40388 · ×1 · Light Gray -
Animal Body Part, Dinosaur, Head, Small40384 · ×1 · Sand Blue -
Animal Body Part, Dinosaur, Legs Short, Dark Gray, Red, Blue Print40380c01pr0003 · ×1 · Sand Blue -
Animal Body Part, Dinosaur, Mosasaurus Head, Toothed with Pin, Dark Gray, Red, and Dark Blue Print40387pr0001 · ×1 · Sand Blue -
Brick Sloped 45° 2 x 23039 · ×2 · Dark Gray -
Packaging Lid, Canister Top, Dinosaurs41342 · ×1 · Black