Compile model

Black Mesa Archive Help!
#1

Hello today I learned how to port patterns. The work was ported Colt King Cobra by Thanez. But I ran into a problem .In 3dmaks model looks smooth, but at compile time became visible polygons. Help me fix the problem
https://imgur.com/a/mrpkX

#2

problem solved

Founded in 2004, Leakfree.org became one of the first online communities dedicated to Valve’s Source engine development. It is more famously known for the formation of Black Mesa: Source under the 'Leakfree Modification Team' handle in September 2004.