The Valtro PM-5 is available with either a fixed stock or a folding stock. It is unusual in that it takes a detachable box magazine. Both 7- and 10-round magazines have been manufactured, although the 7-round magazine is much more common.
They are reportedly actually manufactured by Benelli. Import has been banned for several years now but are used in Europe by numerous Security forces. Renowned for their simplicity, lightweight and reliability, this pump action 12 ga. shotgun has sold on the US market for as much as $1200.00. [Source: wikipedia]
You can download this papercraft model here: Valtro PM-5 Pump-Action Gun Paper Model Free Download [DropBox]