The "View Model" refers to the way your weapon and hands appear on your screen. In the base version of CS 1.6, your customization options are limited to choosing between the left and right hand ( cl_righthand ).
Some weapon models use "body groups" to hide/show parts of a weapon (e.g., an attached silencer, a scope, or a different magazine). A Skin Changer may also manipulate the m_nBody offset.
A skin changer swaps or overrides in-game textures/models (weapon skins, player models) so clients see different cosmetic appearances. A view model changer alters the first-person weapon model position, scale, or which view model is displayed. In Counter-Strike 1.6 (CS 1.6), these are purely client-side cosmetic modifications affecting only the player’s game instance (except when using server-side model overrides or visible player model changes that other players can also see).
> WARNING: LOCAL REALITY OFFSET DETECTED. YOUR VIEWMODEL IS 0.03 SECONDS OUT OF SYNC WITH BASE TIMELINE. CORRECT? (Y/N)
Since these are local files, you don't need to buy crates or keys. Understanding the View Model Changer