I got my dream gun - MP5SD

[gunnar4321]

Have you tried any subsonic ammo yet?

[SeriousStudent]

Have you tried any subsonic ammo yet?

I'd love to see what it does with the Federal 150-grain Syntech ammo.

[Eurodriver]

Have you tried any subsonic ammo yet?

I’ve shot 147gr just to make sure it works and there’s no difference in sound to my ear between that and 115gr or 124gr

It did, however, slow the bullets down so much that you can actually see them in flight. I even got it on video!

[SteyrAUG]

Should be good shooting 124 gr. but be aware that ported barrel isn't designed for anything heavier.

[SteyrAUG]

Have you tried any subsonic ammo yet?

The MP5SD has a ported barrel that bleeds off pressure reducing 115 gr. down to subsonic levels, you really don't want to do that with a round that is already subsonic. Besides dismal terminal ballistics I don't think it's guaranteed that every round will clear the can.

This is one reason I prefer a MP5A2 with an add on can. Similar suppression (with a good can and 147 gr.) and better ballistic performance. Also a little lighter, a little more flexible.

I've been "this close" to snagging a premay MP5SD probably half a dozen times, and while regret not grabbing one at $4,200 circa 2005, I was happier with the other things I purchased. The SD is also a heavy beast compared to a MP5A2 with add on can.

But if you are looking for hollywood quiet, typewriter and falling brass, it will do that.

[Dcr5595]

Love the SD Euro - I’m thinking of going that route with one of my sp5s. So 2k plus stamps will get you there with Dakota?




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[SteyrAUG]

Love the SD Euro - I’m thinking of going that route with one of my sp5s. So 2k plus stamps will get you there with Dakota?




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I'm unsure if they still do MP5 to MP5SD conversions, but if so I'd recommend Curtiss at S&H Arms.

http://sandharms.com/

[utahjeepr]

The MP5SD has a ported barrel that bleeds off pressure reducing 115 gr. down to subsonic levels, you really don't want to do that with a round that is already subsonic. Besides dismal terminal ballistics I don't think it's guaranteed that every round will clear the can.

This is one reason I prefer a MP5A2 with an add on can. Similar suppression (with a good can and 147 gr.) and better ballistic performance. Also a little lighter, a little more flexible.

I've been "this close" to snagging a premay MP5SD probably half a dozen times, and while regret not grabbing one at $4,200 circa 2005, I was happier with the other things I purchased. The SD is also a heavy beast compared to a MP5A2 with add on can.

But if you are looking for hollywood quiet, typewriter and falling brass, it will do that.

Not to dispute, you are way over my head in HK knowledge, but I understood that the SD was designed and ported specifically to run 124g Nato. In my very limited experience that is what we were issued.

BTW, congrats Euro. You always manage to keep me on the edge between "right on dude!" and "I freaking hate this guy! (insert jealousy emoji)".

[SteyrAUG]

Not to dispute, you are way over my head in HK knowledge, but I understood that the SD was designed and ported specifically to run 124g Nato. In my very limited experience that is what we were issued.

You are correct, but it also manages 115 gr. very well which is what the average non military owner typically sources. My main point was you don't want to bleed off rounds that are already subsonic. 115 gr. is going in the opposite direction in terms of fps so it's completely safe.

I'm pretty sure 124 gr. was the standard NATO 9mm round when the MP5SD was developed so yes, that is probably the round it was specifically designed around. This is the exact opposite of what is needed if you have a MP5A2/A3 with an add on can that requires a subsonic weight 9mm (147 gr. or more) for optimal suppression.

That is the primary magic trick of the SD model, taking supersonic 9mm (115/124 gr.) and rendering it subsonic when it leaves the weapon by means of a ported barrel that bleeds off gas pressure. It means you end up with terminal ballistics more like a .380 than a 9mm but it really is "fart in the wind" quiet.

[TED]

The original MP5SD were made to force a NATO spec load to be subsonic. Some of the people building MP5SD reproductions or inspired guns can set it up or tune it for making 115gr subsonic. That might be a more enjoyable option.

Also be aware that there is a difference in the bolt carrier or bolt I forget which between and SD model and a regular model.

TED