Trying to back the viewmodel up from the muzzle point

[PreciseGaps (Precise)]

I managed to get it working a bit, but not that well.

current code on renderstepped that sets the offset

fp2c is the distance from the muzzle to the camera

			local Model = Tool:FindFirstChild("ToolModel")
			
			
			local Params = RaycastParams.new()
			Params.FilterDescendantsInstances = {Viewmodel,Character}
			
			local Origin = Model.FirePos.Position
			local Direction = Model.FirePos.CFrame.LookVector

			
			local Cast = game.Workspace:Raycast(Origin, Direction, Params)
			
			if Cast then
								
				local Distance = (Cast.Distance-Tool.FP2C.Value) - script.Offset0.Value.Z
				print(Distance)
				
				script.Offset0.Value = CFrame.new(0, 0, -Distance)

			else

				script.Offset0.Value = CFrame.new(0, 0, 0)

			end
			end

this happens

https://vimeo.com/1023754584

[PreciseGaps (Precise)]

I finally coded a solution that works all time

in renderstepped

length = a forward part that should be the length of the firearm on the Z axis

FP2C - the distance from the guns muzzle from the camera, this value should be updated on renderstepped but if the viewmodel is going back then do not update it

local FP2C = Parent:FindFirstChild("FP2C")
-- below shows a check that checks if the viewmodel is backing up or not, if it isn't it's safe to update FP2C
	if FP2C and math.abs(Player.PlayerScripts.Viewmodel.Offset0.Value.Position.Z)<=0 then
		local a = false -- if the fp2c value should be updated

		-- I also recommend detecting if only the idle animation is playing and if not make a true

		if not a then
			FP2C.Value =(GetPart("FirePos").Position-Camera.CFrame.Position).Magnitude -- getpart firepos can be your muzzle
		end
	end

viewmodel code

Model = the tools model
EndPoint - the point to raycast from, should be the same axis as the firepos but moved back to the guns length

offset0 = the viewmodels back offset, aka what you want to use and apply to the viewmodel when using pivot to etc

code

			local Model = Tool:FindFirstChild("ToolModel")
			local Length = Model.Length.Size.Z
			local EndPoint = Model.EndPoint.Position
			local FP2C = Tool.FP2C.Value
			
			local Params = RaycastParams.new()
			Params.FilterDescendantsInstances = {Viewmodel,Character}
						
			local Origin = EndPoint+(Model.FirePos.CFrame.LookVector*script.Offset0.Value.Z)
			local Direction = Model.FirePos.CFrame.LookVector*Length
						
			local Cast = game.Workspace:Raycast(Origin, Direction, Params)
			
			if Cast then								
				local Distance = -math.clamp((Cast.Distance-2)-FP2C,-FP2C,0) -- math.clamp((Cast.Distance-Tool.FP2C.Value) - script.Offset0.Value.Z,-Tool.FP2C.Value,Tool.FP2C.Value)
				print(Distance)
				
				script.Offset0.Value = CFrame.new(0, 0, Distance)

			else

				script.Offset0.Value = CFrame.new(0, 0, 0)

			end