Hey everyone, Ive played through the game several times on multiple difficulties I have yet to find the following attachments.

Pistol Laser sight

and is it not possible to put a silencer and laser sight on the Grendel or Scar?

Silencer at Scar i think you can, but the others no.

Just another thing that makes no sense. In Crysis I could customise my SCAR or AK the way I wanted. No I have a "ranged SCAR" which I can not silence, a "silenced SCAR" with no option to put a sniper scope on and a "demolition SCAR" which I can not even switch to single fire. But I am sure this is supposed to improve the gameplay experience in some mysterious way, just like the messed up suit is.

no way the suit is fine the way it is, just some of the mechanics of the game play is weird like the customization of the guns. I think crytek did this on purpose to tease us or something being unable to silence the Grendel or Scar, making the Scarab more accessible then any other gun, making ammo boxes not give Mike, L-Tag, or Gauss ammo. Not being able to find laser pistol sight or extended mag.

things like that, i find are stupid.

I think you can attach a laser pistol sight to the feline, that might be where you'll find it, I don't quite remember where I got it but it does work.

Just another thing that makes no sense. In Crysis I could customise my SCAR or AK the way I wanted. No I have a "ranged SCAR" which I can not silence, a "silenced SCAR" with no option to put a sniper scope on and a "demolition SCAR" which I can not even switch to single fire. But I am sure this is supposed to improve the gameplay experience in some mysterious way, just like the messed up suit is.

I prefer it the way it is now. In Crysis 1 the ability to customize your weapon completely made the rest of the weapons absolutely useless.
For example I would never need a sniper rifle, since I could just put a sniper scope on the AK, switch to single fire mode and even add a silencer on it for much better results.