H&K MP5 K-PDW CO2-powered BB gun – Part 3

by B.B. Pelletier

Part 1
Part 2


Umarex HKMP5-K-PDW is a lightweight, handy BB-firing semiauto.

Today, I’ll begin the accuracy testing of all three of our BB submachine guns, beginning with the first one I tested, the HKMP5-K-PDW.

This gun is semiauto only, so there are only two settings on the selector switch — fire and safe. On fire, you get one shot per pull of the trigger, which is semiautomatic fire.

The trigger-pull is long and somewhat heavy but without any creep. You just feel the movement of the trigger blade until the gun fires. Creep is that nasty start-stop hesitation in a pull that messes with your concentration, and this gun has none of it. read more


H&K MP5 K-PDW CO2-powered BB gun – Part 2

by B.B. Pelletier

Part 1


Umarex HKMP5-K-PDW is a lightweight, handy BB-firing semiauto.

Well, now that I’ve shot the HK MP5 K-PDW, I have a greater appreciation of what it is and how it functions. The stock removal required to replace the CO2 cartridge is troublesome but not time-consuming. However, while I was shooting, the CO2 started to leak, causing me to have to tighten up the screw that puts tension on the CO2 cartridge. This is the first time I’ve ever had to do this in tens of thousands of CO2 cartridges, and it was unexpected, except that I read about it in the customer reviews when they rated the gun. So, I suspect this behavior is common to this gun. read more


H&K MP5 K-PDW CO2-powered BB gun – Part 1

by B.B. Pelletier


Umarex HKMP5-K-PDW is a lightweight, handy BB-firing semiauto.

A real BB gun
At the SHOT Show this year, I was surprised in the Umarex booth by the appearance of a BB gun that looked for all the world like an airsoft automatic electric gun (AEG). One big clue that the HK MP5-K PDW is not an airsoft gun is the lack of an orange muzzle, which is required by law for all airsoft guns sold in the United States, but is not relevant to BB guns.

Let’s be clear about the definition of a BB gun right now. I am talking about a gun that shoots steel BBs — not the 6mm plastic balls that Asian manufacturers call BBs. Those guns are airsoft guns, not BB guns. read more