I bought a HK416D two days ago and love the ■■■ it seems very solid and the performance was great.
I was sold a hop from the shop which fits the vector apparently being the right upgrade for this ■■■, later to find out that I was poorly educated and that this ■■■ already has this inbuilt, at the time of trying to figure out how this hop would even fit on there I have taken apart the front of the ■■■ and a small silver part which looks to be a barrel stabiliser? Is now sliding free up and down when I put the ■■■ back together and tilt it up or down, I tried taking the part out and as assumed the accuracy is dog shit.
Can someone please shed a light of where I’m going wrong or where this piece actually needs to go?
Just realised I can only post one image as a new user, it’s the silver cylinder you can see on the left