HK model 502

CLASSIC12

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I bought this HK model 502 shotgun. I don’t know much about it except what I heard from the LGS (rare, mainly delivered to police forces) and the little info I found on the internet

Is anyone familiar with this weapon ? There is also contradictory info whether it can shoot slugs

“Only buckshot can be fired due to the muzzle device that shapes the shot horizontally in an oval pattern”

“An unusual feature of the HK 512 shotgun was special shot diverter, mounted on the barrel of the gun. It was a sort of muzzle device, intended to create oval, rather than round shot patterns. Depending on the tactical situation on hand, this shot diverter could be set (rotated) for horizontal or vertical dispersion. It also allows use of most types of standard 12 gauge slugs.”

Heckler & Koch HK512 - Wikipedia

Heckler & Koch HK 512 | Weaponsystems.net

Heckler-Koch HK 512 semi-automatic shotgun (Germany) - Modern Firearms

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back in '73, when I was in SF at Bragg, one day some of us were invited to a range demonstration of some "classified" new weapons. One I remember was a shotgun that patterned in a flat, horizontal way. I think it had a fixed choke. We thought it was pretty cool. Never saw one after that.

SF VET
 
Another cool gun we never saw here. :(

Is the “diverter” removable? If not, I would guess a soft lead slug would deform and not damage it, but a hard projectile at high velocity might.
 
Update. HK sent me a pdf manual in German. It states that all conventional slugs can be used

I was a bit worried because after taking one apart it is clearly larger than the diverter exit

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However the LGS whose 512 is pictured in this thread told me he fired slugs through it without problems, and the diverter is identical, except it’s mounted vertically on the 512

Now, the manufacturer’s manual states they can be used, and the LGS has actual experience shooting them.

So with a little apprehension I loaded just one round and fired. Indeed not problem so I fired a few more

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Next time I’ll have to try some buckshots and see the pattern
 
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