Answers: Bullpups

1.
Name: WKW Wilk
Caliber: .50BMG
Action: Bolt action

2.
Name: Steyr AUG
Caliber: 5.56NATO
Action: Semi-auto. Gas-operated rotating bolt.

3.
Name: SKS (with bullpup stock)
Caliber: 7.62x39mm
Action: Semi-auto, Short stroke gas piston, tilting bolt, self-loading

4.
Name: GM6 Lynx
Caliber: .50BMG
Action: Semi-auto

5.
Name: Stealth Recon Scout
Caliber: .338 Lapua
Action: Bolt action

6.
Name: Walther WA 2000
Caliber: 7.62×51
Action: Semi-auto, Gas-operated

7.
Name: Walther G22
Caliber: .22 Long Rifle
Action: semi-auto, Blowback autoloading

8.
Name: XM25 Counter Defilade Target Engagement System
Caliber: 25x40mm
Action: Semi-Auto

9.
Name: FN-H FS2000
Caliber: .223, 5.56NATO
Action: Semi-auto. Gas-operated rotating bolt.

10.
Name: FN P90
Caliber: FN 5.7x28mm
Action: Semi Auto, Straight blowback closed bolt.