gm_construct_port/code/weapons/Pistol.cs

using Sandbox;

[Library( "weapon_pistol", Title = "Pistol", Spawnable = true )]
partial class Pistol : Weapon
{
	public override string ViewModelPath => "weapons/rust_pistol/v_rust_pistol.vmdl";

	public override float PrimaryRate => 15.0f;
	public override float SecondaryRate => 1.0f;

	public TimeSince TimeSinceDischarge { get; set; }

	public override void Spawn()
	{
		base.Spawn();

		SetModel( "weapons/rust_pistol/rust_pistol.vmdl" );
	}

	public override bool CanPrimaryAttack()
	{
		return base.CanPrimaryAttack() && Input.Pressed( InputButton.Attack1 );
	}

	public override void AttackPrimary()
	{
		TimeSincePrimaryAttack = 0;
		TimeSinceSecondaryAttack = 0;
		
		(Owner as AnimEntity)?.SetAnimBool( "b_attack", true );

		ShootEffects();
		PlaySound( "rust_pistol.shoot" );
		ShootBullet( 0.05f, 1.5f, 9.0f, 3.0f );
	}

	private void Discharge()
	{
		if ( TimeSinceDischarge < 0.5f )
			return;

		TimeSinceDischarge = 0;

		var muzzle = GetAttachment( "muzzle" ) ?? default;
		var pos = muzzle.Position;
		var rot = muzzle.Rotation;

		ShootEffects();
		PlaySound( "rust_pistol.shoot" );
		ShootBullet( pos, rot.Forward, 0.05f, 1.5f, 9.0f, 3.0f );

		ApplyAbsoluteImpulse( rot.Backward * 200.0f );
	}

	protected override void OnPhysicsCollision( CollisionEventData eventData )
	{
		if ( eventData.Speed > 500.0f )
		{
			Discharge();
		}
	}
}