Australian TAG The Tactical Assault Group is one of Australia’s counter-terrorism units. Here we see a mix of M4’s and MP5’s. Note the STANAG claw mount on the MP5. With the gas mask on and at that mounting height, a proper cheek-weld is impossible, which they’re probably trained to adjust to. The large circular lens on their gas masks indicates they use the older AVON S-10, not the newer FM-12.