It’s a blowback-operated ... And that, alone, makes the Umarex Heckler & Koch MP5 A5 .22 LR worth a close look.

Like the MP5, the PSA5′s charging handle sits forward and to the left of the receiver (HK-slap capable, for all you fanboys), and makes use of a roller-delayed blowback system. A welded upper ...

H&K’s partnership with German manufacturer Umarex ... MP5. The G36 .22 LR follows these models as a full-size version of the original, but chambered for the rimfire cartridge and employing a ...