Starting on a MP5SD build pics/details inside

I have a MP5K PDW clone and a MP5N clone that I have put together over the years. I am really happy with them. Recently after a long talk with Jeff (Ghilliebear) I managed with his suggestions to change out the locking piece to a RCM 100 degree and swap the bolt head for a RCM, the PDW is running flawlessly. My MP5N has always been 100%.



Now I am going to venture into new territory. Ive been wanting to put together a MP5SD clone for a long time. Today I bought this MP5SD clone receiver that is barreled and finished already. I have around $780.00 in it. With the help of Adam @ HKParts | Heckler & Koch Genuine Parts - HKPARTS.NET am hoping to finish this off rather quickly. As soon as the reciever arrives Ill get the Form 1 submited and start populating parts. The questions I have are about the silencer. I would like to fire it unsurpressed, not ubsonic. That being said.......Who makes a fake can that will thread on so I can fire the gun? I figure Ill use a fake can and a 100 degree locking peice and it will run unsurpressed like a champ. I plan on a surpressor later, but one stamp at a time. this is getting pricey.

Are there any details, words of advice, things I need to be aware of with the SD platform before I get started? Thank you guys in advance for your help in this project. I keep you posted on the progress.
Colt



My goal is this:


So I sat down and figured up the cost. Here is what I have so far:
Here is what I have researched for the build $$$
1.MP5SD barreled upper from BMP$835.00 (Purchased already)
http://www.gunbroker.com/Auction/ViewItem.aspx?Item=257801686
2.Converted Semi SEF Lower from RTG$280.00 (Purchased already)
http://www.robertrtg.com/hk94semiautofcg.html
3.POF A3 collapsible stock from RTG$215.00 (Purchased already)
http://www.robertrtg.com/pofmp5collapsiblestock.html
4.US Made (RCM) and German MP5/94 Bolt group $480.00 (Purchased already)
http://www.hkparts.net/shop/pc/MP5-94-Bolt-Group-US-German-HK-90p2201.htm
5.MP5 Stock push pin$6.00 (Purchased already)
http://www.hkparts.net/shop/pc/HK-German-Butt-Stock-Push-Pin-5p76.htm
6.Fake silencer to seal holes in barrel$XXXX? (awaiting info)
http://www.rdts.com/HKMP5SD.html
7.BATF Form 1 tax stamp$200.00 (waiting on reicever to arrive)

Total should be $2016.00 plus the Fake can. I have to call RDTS monday for a price quote. I included shipping and transfer fee in my calculations.
What were the Coharie Arms MP5SDs selling for? the way I figure it, I will have a better product by doing it my self, with the parts list Ive came up with. Any suggestions, thoughts?
Thanks

More pics and details on the project:
I wish it took a normal supressor. The SD version has holes at the rear of the barrel like a compensator. The supressor is designed to be internal or some what intergrated. Check out the pictures.

Very cool. That is my ultimate dream gun MP5SD.

Just Ordered the Can from RDTS. This thing is going to be sweet!

thats going to be nice!!!
the dealer I bought my m11/9 from let me shoot his dealer sample SD and it became a dream gun(along with the 53) for me,I need to look into doing this

Tag for pics!

black market parts is bobcat/cohaire/whatever other name they've used, correct?

MP5SD is one of my "love to have it but will never have to cash to afford it" guns.

That barreled receiver isn't considered an SBR as is?
Also how much is that suppressor from RDTs? I am interested in this as well.....

no, Bobcat is not Blackmarket or Cohaire. I have a Bobcat and had to call for a FTE issue. While chatting with them I asked and they said they were in no way apart or affiliated with Todd. They did say they got some parts from him but, that was it.

It will be a SBR if you register it as a rifle then assemble it. To get around that when the reciever comes in I will have the dealer call it in as a pistol. From that point forward it will be a pistol. I can assemble with a end cap and fire while I wait for the Form 1 to come back. When the Form 1 is approved it will then be a SBR and I can ad the stock. I paid $210 for the fake can. The real surpressor they sell for $700. Ive seen reviews that it is queiter than the factory HK surpressor

Most of the parts have came in. Still waiting on the receiver and fake can. I filled out the Form 1 paperwork. Just need the S/N and then drop at Chief of police's office for signture. Then wait with the end cap on. I dont mind though. At least I can shoot it that way while I wait. Gives me a chance to work out any bugs.

So going this route with a black market receiver/barrel combo itsall just plug and play if I get quality parts? I looked at the RDTS website and it seems that they port the barrel differently, is that going to effect the can preformance at all? Reading their site info on the MP5SD HE got me thinking, can they modify and port an AR 9mm barrel to work with that suppressor? I really want an MP5 like this but I can't spend almost 3g on a different gun not to mention the local CT law stupidity I have to follow.

I would call Ralph, they have proubably done this. It would be cool.

Shot him an email, let's see what he says.

Tag. Having recently shot a real MP5SD, I've got the strong urge to build a clone. I'd like to to be a really good, reliable clone. I'm normally over in AR and AK land, and the HK world is new to me. From what I've found, the "quality" options for a solid MP5 build are limited. I'm still trying to sort the good from the bad here.

Well over the years their have been several HK roller lock platform builders that where marketing their products, haveing not worked out the bugs. Most of them have went out of business for one reason or another. Alot of people are really worried about purchaseing items from Blackmarketparts/ Coharie/ Special Weapons/ Bellator/ Vector/ Bobcat Arms, ect. They all had some conection to Todd Baily. He has been supplying US made Parts to just about everyone for sometime. Sometimes those said guns were finky. If you know what you are doing and what parts to use you can build a really reliable gun yourself. The parts I have chose for this build have been specifically selected for reliabilty. RCM is as good as factory HK, when is comes to internals. The lower I am using is a clipped and pinned HK HK91 lower that has been modifided and HK 9mm ejector lever swapped to work on a MP5 platform. SW receivers and barrels have come a long long way as far as quality is conserned and I am not the slightest bit worried about that. Ive had lots Coharie/SW guns that were not reliable that I simply swapped interals/magizines with HK or RCM parts and they where 100% perfect after that.

Why not get a real SD suppressor? Knights is doing a run right now...

http://www.silencertalk.com/forum/viewtopic.php?f=91&t=67765

I will proubably have Ralph Smith do one for me here shortly. I need to find out were to ship it to. I live in the middle of no where in GA:( Not my choice I am in the military. Ill work it out..............

Now which one preforms better?

Hey guys.
I have an MP5SD RDTS suppressor for sale.
Original HK 1.5" profile, Stainless steel, fits oem type threaded barrels like Coharie, BMP, RCM, HK ect.
Round count is less than 20 and its like new.
$500 on a form 4 in TX
PM for further details

PM in route

SD's are one of my favorite MP5's. They are pricey and there is now way around it. Even if you go the clone route. @ $2,000 your doing well. I used HK guns and prefer HK parts but some of the new clone parts are real good from RCM.
You might have to change the LP out going from the fake can to the real suppressor. Plugging up the bleed holes will increase the pressure and open it up to quick with an SD LP installed

Here is a couple of mine.

HK MP5 SD conversion by RDTS


HK MP5/40 SD conversion by RDTS


MP5 group pic

OP, where did you get the lower and the forearm?

ETA: You are inspiring me to build one. I am getting butterflies just thinking about this.

Also, what is so bad with Cohaire?

So is this everything I need?

Barreled Complete Upper 760.00
Forearm 100.00
Trigger Pack and Lower 216.00
Retractable Stock 215.00
Bolt Group 480.00
Push Pin Set 6.00
RDTS Suppressor 700.00
Tax Stamps 400.00

Total: 2877.00

Seriously, is this everything?

I got the lower and stock from RTG. Excellent price. Coharie Arms has been ironing out some bugs for awhile. The one i have I had to swap the bolt head and locking piece with RCM parts. It cycles great now. Before it would stove pipe every other round. Mostly ejection issues. HK mags a help the feed issues too.

Only thing you missed was the supressor o-ring. www.HKparts.net has them.

Well, thats it then, I am going to finally have a SD. I'll buy up yhe parts in January.

OP, can you well me more about the modified ejector lever you mentioned in one of your post on page 1? Do most trigger packs have this feature? Is there a certain kind I need to stay away from?

The lower is 100% HK parts. They changed the ejection lever to a 9mm so it can be used on a 94/MP5. Clipped and pinned is a little harder to explain so look at this.
http://www.hkparts.net/shop/pc/Trigger-Housings-Explained-d26.htm

I really appreciate that.

You are more than welcome. I can't wait till Tuesday to pick up the reciever. This one is going to be sweet. I own lots, and lots of crazy,exotic type guns. I'm excited about this build.

Ok, but I want pictures. Do you have any updates about the compatibility between the black-market receiver and the RDTS suppressor?

Well, When I last spoke with Ralph Smith at RDTS I gave him the thread pitch that BMP told me on the phone. Ralph said that they pitch was the same as the factory HK. His surpressors are made with a different thread pitch. But he said he can make a suppressor with what ever pitch you need. He is making my fake can with factory HK thread pitch. If I order a can from him Ill order the same.

Awesome. You didn't happen to ask him how much his cans cost (real ones), did you? I feel like I have read that they were in the $700 range, but I could be totally crazy. Thanks for being so helpful.

I didnt ask but I have heard the same $700.00.

Man, January can't get here soon enough! Be sure to keep us updated with pictures.

Thanks again.

Well today I got the receiver in. I lubed and assembled the parts. It is pretty impresive. I am still waiting on the fake can so I can shoot it. It manually cycles smoothly. Everything fit together perfectly like a glove. I think I am going to start the SBR form 1 this week. Then wait....................I ordered the surpressor today. I also swapped the lower with my fullsize Navy. I like it its shapping up:)

MP5SD is my favorite!! this is a bad ass build!

where can one get just the handgaurd? the ribbed part...

www.hkparts.net has them

thanks..im thinking about a 9mm AR set up like a mp5sd...heres a quick photoshop..

http://img4.imageshack.us/img4/116/ar9sd.jpg

compared to mp5

http://www.thespecialistsltd.com/files/Replica_HK-MP5SD.jpg

still not sure on the fixed stock length, a1 or entry...theres a couple a3 style collapsible for the ar, but would have to be running a DI instead of blowback cuz of the short buffer tubes...

sorry to hijack your thread, BACK TO THIS AWESOME BUILD!

I did a build something similar to what you have in mind. On a RRA 9mm, I used a Spikes Tactical fake can thats threaded in the front. It coveres the barrel. Then I used a YHM Spectre free float rail. the can went under the rail. It looks bad ass.

I loved my SD, sad when I sold it, but I know I'll have another one before too long. Good luck on the quest!

OP

Thanks for this thread. I couldn't help myself and went out and built one myself.

Renegade,

Where'd you get your lower from? Hkparts wants about $700 for that lower...surely there has to be a better deal out there.

I had it lying around. In fact, the only parts I needed to make this build were the upper, handguard and silencer. I had everything else.

Must be nice.

Buy low, sell high.

Curious, are your front and rear sights mounted backwards on purpose?

I love the MP5SD! I did get the opportunity a few years back to shoot a real one. Suppresed Full Auto kicks ass!

I would love to have a 9mm clone, but man, that is some money. I'll just have to make due with my GSG5SD. Eventually I will get it SBR'ed and Suppressed, but that's a few years away.

Moar Pics of finished rifle

And one of you guys needs to buy this and see if it fits:

LINK

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