actually i think it is scoped
it looks like an hk g 36
there is a laser finder under the barrel tho,i think
I reckon it's the British Army's 'Sharpshooter'. That's a bipod underneath.
It was introduced so that they could fight the Taliban at longer ranges. It's 7.62 mm (rather than the smaller and lighter 5.56), holds 20 rounds and looks pretty gucci.
The slight differences, such as the scope, stock, and forward grip are just different add-ons.
I reckon it's an overkill for coppers to be using it.
Added later: I'm talking twaddle; they're different weapons. My slanty eyes aren't working properly today.