The HK Slimline Stock is really, really Germanic.

It’s not a cool guy stock, a point of interest, or something ‘a bit different’. It cannot be so easily explained away. It’s pure function over form and for that reason it’s immensely ugly to look at.

But that’s part of its charm.

You know those Birkenstock sandals – the orthopaedic looking ones? They look shit but feel really good on, I’m told. That’s what this stock is like. Used as a stock, it’s great. It just looks like something that would be prescribed for fallen arches.

But, it is a product which I would speculate has been properly planned (I like plans) and designed (I like design), by a logically-minded team of qualified engineers; obsessed (I’d hope) with efficiency. Remember, stating to a German colleague that they are inefficient is the worst insult in the world. Ever worked with an inefficient German colleague, though? No you haven’t.

As its name would suggest, this stock is really, really slim. You wouldn’t think that, looking at it from the side. It looks lumpen and clumsy, but it’s actually quite diminutive.


The opportunity cost of the stock’s slimness is cheek weld; so this may not be one for those who prefer happy to skinny.

However, the very best thing about this stock is that it was built specifically for the HK416. For that reason, it suits the HK416 very well indeed.

Do you ever become tearful, because RS stocks come in two sizes: military spec and commercial spec? If you do, you may be interested to know that this stock fits both mil and com spec tubes solidly, with no movement. I know this, because I tried it out. It’s got a device inside, which is sprung and stays in contact with the buffer’s rails.

Like I said, properly designed.


The stock’s position along the buffer tube adjusts via a paddle at its leading edge. You can see its pivot point at the front of the stock:


You’re not going to activate the paddle by accident and even if you did, the stock probably wouldn’t move. And that’s perhaps my only gripe. Don’t plan on easy adjustment, because with the device inside which stops it slopping around, this stock is very firm and likes to stay put.

The rear of the item supports a pretty chunky rubber butt pad and it’s angled like all good, modern stocks should be. A convex butt pad, more like that of the original E1 HK416 stock, is also available.

Also akin to the E1, the Slimline Stock features a grip surface at its leading edge. I remember reading that this enables the user to grip the stock and pull it into their shoulder with their support hand, when the front end of the blaster is supported by other means.


The top of the stock has a window so you can identify preferred stock positions visually. Just pop a dot on the buffer, through that window, with a Posca pen for hassle-free adjustment.


There’s also a MASSIVE slot through the stock, which provides an attachment point – but no integral QD sockets, which is disappointing (not that I use them).


And, just to top it all off, it looks like something that’s fallen off a Stealth Fighter.

As long as you don’t paint it any other colour than black.