How do I attach a part to a character's hand like a weapon?

I've tried using weld constraints and attachments but they always end up glitching the char out. I'm not sure what else to do at this point. Here's what keeps happening: https://gyazo.com/bfbd104efdef01dcbe29fe90c3f12d79

Here's part of my script as well:

local s = game.ReplicatedStorage.RedBlade:Clone() s.Parent = game.Workspace s.CFrame = char.HumanoidRootPart.CFrame s.CanCollide = false s.Anchored = false local w = Instance.new("Weld") w.Parent = char w.Part0 = char.RightHand w.Part1 = s w.C0 = char.RightHand.CFrame en = true

You would make a Weld and have Part0 set as your hand, and Part1 set as the Handle or part that you’re trying to connect.