Heckler and Koch Hk SP5K Modifications, Barrel Installs, and Conversion to MP5K

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Modifications available for the Hk SP5K

Hk is bringing back the civilian version of the MP5K for the first time in nearly 25 years.  There has been a lot of interest in converting the SP5K to the MP5K setup to get the features of the factory MP5K and MP5K-N.  Some customers are also interested in making the SP5K CA compliant which requires converting it to a rifle configuration adding a fake suppressor, fixed stock, and bullet button or grip wrap.

The most common upgrades to make the SP5K like the MP5K / MP5K-N would be:  3 Lug barrel, paddle mag install, and model restamping.

Want to send in your SP5K for work Start Here SP5K Work Order Form

You may not get an immediate response from me after the form is submitted.  I’m switching to taking these in all at once in one group now that the SP5K is not as readily available as it was in 2016.  That allows the customer to be without their SP5K the shortest amount of time and makes for a more consistent 3 to 4 week turn around time.

Services/Prices for Converting SP5K to MP5K or MP5K-N

RCM 3 Lug MP5K Barrel with MP5K-N Style Threaded Muzzle  (available with 1/2 x 28 or 1/2 x 32 threads) or Standard Non Threaded 3 Lug – Usually $175 to $150 it depends on availability a lot of customers now just supply their own barrel.

Labor to Replace Barrel $595

Paddle Mag Install $295

Paddle Mag Lever and Contact Piece $110 (Factory New Hk Parts, you may provide your own parts as well)

Restamp Model on Forward Part of Top Rib to MP5K or MP5K-N $295 (new or traditional style Hk logo available)

Refinish Upper Receiver and Barrel Assembly $295

For those that want to use their SP5K with a registered sear I recommend going with the RCM SP5K auto carrier I usually have those in stock for $175.  If not I can acquire them for you before hand.

Modifications for Converting SP5K to Non SBR Rifle 

RCM 3 Lug Barrel $150 or $175

Labor to Replace Barrel $595

Fake Suppressor to get Barrel Length over 16″ $185

Perm Attach Fake Suppressor $80

Install US Parts and Bullet Button or other CA Compliant Device $45 (this is labor only and does not include the US parts or CA Compliant Device)

Refinish Upper Receiver and Barrel Assembly $295

Remarking and Paddle Mag Installs would also be possible on the CA compliant Rifles for the same price as those listed for the MP5K Conversion.

Want to send in your SP5K for work Start Here SP5K Work Order Form