MP-40 Carbine Features This is the closest you can get to an original MP-40 while keeping a rimfire action. This model comes with an underfolding stock (like a real MP-40) and a faux suppressor. MP-40 Carbine Specifications Brand: Mauser Rimfire Category: Rimfire Rifles Series: Carbine Caliber: 22 LR Model: MP-40 Stock Finish Group: Black Action: Semi-Auto OAL: 32.48 Sights: Adjustable Rear Size: Full Size Barrel Finish: Black Muzzle: Faux Suppressor Twist: 1:16 Receiver Material: Steel Stock Description: Underfolding Barrel Length: 16.30 Max Capacity: 23 Receiver Finish: Black Stock Finish: Black