MP5K / SP5K Receivers / Uppers
Build a solid foundation for your firearm with MP5K receivers and SP5K uppers from HKP. Our HK Parts include precision-machined upper receivers to ensure accuracy and reliability. Complete your build with the best MP5K and SP5K receivers available.
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Choate MP5K/SP89 9mm Steel End Cap W/ Buffer
Choate
$45.95MP5K & SP-89 Steel End Cap With Replaceable Rubber Buffer Fits perfectly on all HK MP5K-type builds or projects. All metal construction, so you know it will last. Each unit comes with a sling loop for use with multiple sling types. Compatible...$45.95 -
MP5K Complete Weldment Set
$59.95MP5K Complete Weldment Set Each set of weldments is all of the weldments required for an MP5K flat. Includes: Rear sight base Sight tab Case deflector Semi auto shelf Side reinforcement tabs 2 X rear stock bushings$59.95 -
RCM MP5K/SP89/SP5K 9mm RS Trunnion
RCM
$69.95MP5K Reverse Stretch Trunnion US-made to exact factory HK specifications for the HK MP5K, SP89 9mm builds. There is a difference between the MP5K and the MP5 trunnion. This offering is the correct trunnion for the MP5K and all MP5K PDW variants,...$69.95 -
Out Of Stock
HK MP5, MP5K Case Deflector
H&K Heckler & Koch
$0.00HK German case deflector for receiver flat or receiver for all MP5, HK94, MP5K & SP89 builds. The case deflector is riveted or welded in place on the ejection port of the 9mm receiver/flat to aid in the extraction of the 9mm round. HK MP5, 94 HK...$0.00 -
HK End Cap - Detent - Cocking Tube
H&K Heckler & Koch
$4.95HK German Cocking Tube End Cap/Dust Cap Detent HK German cocking tube detent for all steel and aluminum cocking tube end caps. Made of steel and finished in black.$4.95 -
HK MP5, MP5K Rear Sight Base
HKP HK Parts
$19.95MP5 & MP5K Rear Sight Base- Weldment The only factory-correct sight base with the factory HK German side axis grooves. Compatible With: HK MP5, 94 HK MP5K, SP89 HK MP5 40, MP5 10 MAC-5 clones may require custom fitment. Modified components are...$19.95 -
HK MP5K, SP89 Flat Receiver - 9mm
HKP HK Parts
$199.95MP5K, SP89 Receiver Flat - 9mm New MP5K receiver flat made by the original German tool and die maker of the LSC receiver flat utilizing factory original German prints and specifications. The creator of our receiver flat has been regarded as the premier...$199.95 -
HK MP5/K Billeted Scope Tab - Weldment
HKP HK Parts
$9.95HKP HK MP5/K Billeted Scope Tab - Weldment Billeted scope tab weldment for HK MP5, MP5K, and compatible clones. Provides a correct mounting point for optics. Compatible With: HK MP5/94 HK MP5K/SP89 HK MP5 40/10 Clones or custom builds$9.95 -
$14.95 -
HK MP5K Receiver Flat - 10mm / .40 S&W -
HKP HK Parts
$199.95MP5K-40, MP5K-10 Receiver Flat - USA Receiver Flat for use with a MP5K-40 or MP5K-10mm build. Please note: This is for the flat as picture no weldments are included. ***This US made receiver flat counts as one required 922r compliant part***$199.95 -
On Sale
HK MP5K Trunnion - Gunsmith Special
USA
Now: $18.71Was: $54.95HK MP5K Trunnion - Gunsmith Special US made HK MP5 trunnions sold as-is. Will require work before being functional. We recommend the work be performed by a professional gunsmith. The condition will vary from part-to-part vs. the pictured unit. Compatible...Now: $18.71Was: $54.95 -
HK MP5 Barrel Retaining Pin - 5.015mm
H&K Heckler & Koch
$14.95H&K 90 Series Barrel Retaining Pin - 5.015mm Each barrel pin is used for installing a new or replacement barrel. HK suggests using a new factory barrel pin when installing or reinstalling an HK barrel. Compatible With: HK MP5, SP5, MP5K,...$14.95