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.   I’ll be stocking RCMs 3 lug MP5K barrels, they are a great quality nitrided barrel.  RCM has given me a discount on their barrels as well so I can provide the barrels to customers at a very competitive price.

Typical Turn around time for the conversion work is about 3 to 4 weeks.

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

RCM 3 Lug MP5K Barrel with MP5K-N Style Threaded Muzzle $150 (available with 1/2 x 28 or 1/2 x 32 threads) or Standard Non Threaded 3 Lug $130

Labor to Replace Barrel $495

Paddle Mag Install $275

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 $275 (new or traditional style Hk logo available)

Refinish Upper Receiver and Barrel Assembly $225

For those that want to use their SP5K with a registered sear I can also weld and machine the carrier to auto specs for $225.  I do recommend going with the RCM SP5K auto carrier instead  I have those in stock for $175.

Modifications for Converting SP5K to CA Compliant Rifle

RCM 3 Lug Barrel $150 or $130

Labor to Replace Barrel $495

Fake Suppressor to get Barrel Length over 16″ $165

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 $225

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.