Ah yes, the SynTax P40 Assault Rifle.
Another fine additional to your Sci-Fi arsenal.👌

You can find more detailed renders and information on the Artstation page here or the download link for the original model here.

Includes:
artstation\laurentiun\artst_syntax_p40.mdl
artstation\laurentiun\artst_syntax_p40_belt_buckle.mdl
artstation\laurentiun\artst_syntax_p40_belt_buckle_belt.mdl
artstation\laurentiun\artst_syntax_p40_bullet.mdl
artstation\laurentiun\artst_syntax_p40_bullet_round.mdl
artstation\laurentiun\artst_syntax_p40_magazine.mdl
artstation\laurentiun\artst_syntax_p40_sight.mdl
artstation\laurentiun\artst_syntax_p40_suppressor.mdl

Credits :
LaurentiuN - Original creator of the model.
NeoLin - Porting to Source.
Fennecai - PBR to Source Converter.