Well, yes.
Yes it does!
I whacked the black HK416A5 rail, with integrated BUIS, plus the black MFT Battlelink stock on to the SGT HK416D for an alternative look.
It’s very difficult to get bored of a blaster where it’s so easy to change the rail.
BUIS stowed:
Change the rail, change the whole look.
I think I prefer the tonal RAL8000 look overall, but I’m changeable.
Looking through the pics again, I think I like the blaster best without its can in black. With can, I think I prefer the blaster in RAL8000.
But, I need to sort out a front BUIS for the RAL8000 rail.
Of course, I realised after taking the pics that the Aimpoint is in the wrong position.
It should be level with the leading-edge of the magwell, like this:
The Reptile House 