First time I’ve completely stripped my AP5-P for cleaning and I noticed the lip on the hand guard just barely goes into the front of the reciever. A buddy has one that’s been SBR’d so the only other one I had to try was his forward grip model from HKP. By applying just a little forward pressure on the vertical grip I can rotate the lip out of the receiver. I’m assuming there’s no easy fix for this issue ?

I wouldn't worry about as long as it isn't falling off. The pin holds it on there.

My AP5-P hand guard retainer is a little cock-eye but it doesn't effect anything. I'm still able to get my suppressor on the tri-lug.

I would check my hand guard for you but I lok-tighted my front quick disconnect sling mount.

Attached File

First post is correct.

With that said, I ended up replacing mine for the Magpul one and I like the fit better. Goes over the front part of the receiver and comes with its own pin. It's much more stable but does not retain the classic MP5K look.

Magpul hand guard

I agree.
I much prefer the Magpul handguard.
But, based on my experience with two different guns, once you remove the Magpul handguard it never fits as tightly again.

When new, it’s such a tight fit that it’s hard to get on the gun, and hard to get off.
When I remove it then reinstall it, there’s always a little wiggle after that.

I’m wondering if an O-ring around the clip that catches on the front trunion will help?

YMMV

I've got the K version like drobs.  HG fit is not so good.  I have to tap the front of the hg to seat it and get the pin holes to line up.