3D　modeling　is　a　time-consuming　and　laborious　work　in　virtual　assembly.　How　to　reconstruct　parts　with　various　shapes　quickly　and　accurately　is　an　important　topic　in　the　field　of　reverse　engineering.　In　this　paper,　a　popgun　and　its　special-shaped　parts　are　reconstructed　by　using　a　self-developed　surface　structured　light　scanning　system　and　a　commercial　line　structured　light　scanning　system,　with　an　accuracy　less　than　0.1mm.　And　the　virtual　assembly　of　the　popgun　is　completed　according　to　the　high-precision　3D　solid　models.　©　2021　IEEE.