Help identify a few firearms

[Dodger67]

What are these two different sniper rifles and a SMG/PDW used by the South African Police Service's Special Task Force (SWAT)

 

[Bonza]

The rifle without the fluted barrel looks like an Accuracy International to me, and I'm pretty sure those SMGs are the 9mm variant of the Heckler & Koch UMP. The other rifle I know I've seen somewhere before, could be a Blaser L93 perhaps?

 

[RobWilliams]

AI actually offers the AICS (Accuracy International Chassis System) which can fit the R700, it probably is an AI rifle but it could be a R700.

The attached image - which I took - was a Remington 700 in .300 WSM which - if the barrel was black and minus the suppressor - could easily look like an AI rifle.

 

[Dodger67]

The one with the fluted barrel could be a Truvelo - Sniper Rifles | truvelo.co.za