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I'm in the position to purchase a SP5K-PDW what should I know before purchasing

4K views 48 replies 21 participants last post by  MNDoubleLung  
#1 ·
I'm in the position to purchase a SP5K-PDW what should I know before purchasing. Should I get the Euro version? Any info would be helpful.
 
#4 ·
Thank you for the helpful tips, I've always wanted one and now have the $ to purchase. I don't want to jump into the purchase without knowing anything. The SBR approval is must and accessories. I'll have to look for a MP5 class here locally.

I'm looking at one with 2 magazines, a soft case, sight tool and a sling brand new for $2900. Is this what there trading for nowadays?
 
#6 · (Edited)
1) Only the HK USA imported model covered by HK USA
2) Different shelf than 94, thus different clip and pin dimensions for housings
3) If you SBR it, it is subject to 922r compliance
4) 1/2x28 thread pitch, which is not compatible with the KAC MP5 suppressor (1/2x32 threads)
5) Has a block in the rear of the receiver to prevent dropping in a full auto bolt carrier
 
#7 · (Edited)
Get HK genuine magazines. Don't waste your time with the cheaper aftermarket options.
Yes, the HK mags are expensive. But it's a buy-once-cry-once scenario and it's really nice to have at least 4-5 spare mags that you know are all 100% good to go.

ETA- the 1/2x28 threading is honestly an advantage for most of us; we'll rarely if ever see a chance to buy the correct KAC suppressor, might as well have the 'industry standard' thread pitch for suppressors if you opt for a can. But if you do, 3-lug is the way to go anyway :)
 
#16 ·
Thank you Keith,

I’m going with the US model to be covered by warranty, I like the bag it come with more.

Can you explain to me what you mean by 94’? I hear a lot 90 series, not sure what it means.

100% SBR by the books for sure.

Not to worried about the correct suppressor pitch.

Is there something I’m missing dropping a full auto in my SP5K, isn’t 15k-25k to so?
 
#20 ·
I’m going with the US model to be covered by warranty, I like the bag it come with more.

Can you explain to me what you mean by 94’? I hear a lot 90 series, not sure what it means.
HK94 was the original 16” semiauto import model. A block shelf replaced the front push pin hole so machinegun trigger groups would not be “drop in” - 90s/9X series guns are inclusive of the other models like HK91, HK93, etc that were imported in the same era with similar modifications for import

Someone else might be able to shed light on how far you can mod SP5 variants before HKUSA voids warranty?

HK94 reference pic
Image
 
#26 ·
Make sure your credit is very good.

Like Lay's Potato Chips, you can't stop at just one. ;)
 
#34 ·
It's great to have a choice/preference
But some choices make more sense than others.

as the K is a pistol sight radius vs. rifle.
That's less an issue of sight radius (defined as distance between front and rear sight) and more an issue of intended use.

If you use the K length MP5/SP5 in it's less efficient form without a stock or brace at arms length like a pistol, the castle rear drum is the more viable choice.

If you use the K-length MP5/SP5 in its more modern evolution as a "PDW" with a stock or a brace, that brings the rear sight closer to your eye, making the castle rear drum definitely the worse choice and the diopter drum the correct choice while the sight radius stays the same.

Legally (at least in the US) one is defined as a pistol, the other is a short barreled rifle, but even then this definition gets washy once you put a brace on that pistol.