[cerboknight]

Welcome to the forum, but you should make an intro post

But my M24 does that, I think it's the receiver scratching the cylinder because you're pulling it at an angle.

Think about it, you're always pulling on the bolt handle alone so you're going to be pulling it back + to the right.
Some people think (me included) that if you put your thumb behind the bolt so it becomes a straight bolt pull it helps.

 

[cerboknight]

Hold on, I'll just take a picture of what I mean. It's much easier than trying to explain it (I know my explanation isn't the best!)

 

[cerboknight]

Here you go.

I think it's pretty self-explanatory

(Sorry for the bad focus in the pictures, I use an Ixus for snapshots and it's not the best at knowing where you want to focus :S)

 

[cerboknight]

No worries

Now I'm in the pics mood it's time to make a disassembly guide for my GBBR M4.... Thanks

 

[cerboknight]

Less than an AEG though
More realistic too, that's the main point for me having one

 

[cerboknight]

It is, but living in the UK means I don't have a chance to own an AR right now so I can't really give a fair comparison realism wise so I can only say it looks more realistic than an AEG

It's got a nice kick to it as well

Well, maybe 'feedback' would be a better word to describe it, but it's nice.