The Umarex EBOS – Part 3

by B.B. Pelletier

Part 1
Part 2


The new EBOS is a loud, powerful BB submachine gun.

Today, I’ll finish the test of the Umarex Electronic Burst of Steel — the Umarex EBOS. This is accuracy day, and the test runs exactly as it has for the other two BB submachine guns I’ve tested — the HK MP5 K-PDW and the Umarex Steel Storm. That means 10 aimed shots at 15 feet on semi-auto, followed by several bursts of full-auto fire.

I have three BBs to test today, and the EBOS brings us a complex set of operating parameters. You can select from either one shot, which simulates semiautomatic fire, a 4-shot burst or an 8-shot burst. But there’s also the rate of fire to select. It can be set for 300, 400 or 500 rounds per minute (RPM). I discovered very quickly that 300 RPM is too much like shooting an M3 grease gun, which bounces around in your hand without much possibility for accurate aimed fire. So I did what every EBOS owner will eventually decide to do. Set it to 8-shot bursts and 500 RPM. Once I did that, I made no attempt to test the other rates or the lower burst count. Nor would a cigarette boat owner use a trolling motor for better fuel economy!

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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.

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The Umarex EBOS – Part 2

by B.B. Pelletier

Part 1


The new EBOs is a loud, powerful BB submachine gun.

Well, this report is somewhat overdue, but I’ve been waiting for some of the new RWS BBs to test for you, because of some good things I’ve heard about them. Looking at these BBs under a 10x loupe, they appear smoother than even the Daisy precision ground shot made for the 499 BB gun.

I plan to test this shot in several ways for you with guns we have a baseline on. But that will be later. Today, we’ll look at the Umarex EBOS velocity. And velocity it has! The specs say 540 f.p.s. and by golly that’s what I saw!

The EBOS is run by a battery-powered electric motor, so many of you are considering it as a replacement for the Drozd. I’m no expert on the Drozd, but I’ll report on the EBOS as it operates similar to the Drozd and let you judge for yourselves. What I mean by being run from a motor is that the firing function is controlled by that motor. The power that propels the BB comes from CO2, of course, and the EBOS uses the big 88-gram CO2 cartridges that give hundreds of shots. But the electric motor takes care of firing the gun once you pull the trigger.

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The Umarex EBOS – Part 1

by B.B. Pelletier

Well, it was inevitable. Just as I was reporting on the Umarex Steel Storm, somebody said they had heard that the new Umarex EBOS (Electronic Burst of Steel) was the better BB submachine gun. If you go looking for the EBOS, don’t look among the air pistols. Even though the firearm it is copied from probably fires a pistol cartridge, the presence of a fixed shoulder stock has caused Pyramyd Air to place this BB gun among the rifles.

There will probably be debate over which of these three new BB submachine guns is the best for a long time to come. I won’t get into that, but I’ll review the same things on all of them so you can make up your own mind.

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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.

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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.

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