HKPRO Forums banner
1 - 20 of 37 Posts

·
HK Shooting Team
Joined
·
3,012 Posts
Different shelves

Sp5k has auto bolt block and adapted carrier for block

Non sp5k trigger housings will not fit the sp5k

Sp5k is current and badass!
 

·
Registered
Joined
·
1,302 Posts
The SP89 uses the older metal lower trigger housing with separate plastic grip. The SP5K uses the latest generation all plastic lower trigger housing that has pictogram markings and more importantly ambi trigger pack and ambi selector. Those things alone add a lot of value to the SP5K as they are not cheap items.

As previously mentioned.

SP5K has a top shaved semi-auto bolt carrier with a nub on the inside of the receiver that blocks a non-shaved (i.e. FA) bolt carrier from being used. This can easily be defeated or the semi-auto bolt can be modified to support FA.

SP5K has a different shape semi-auto shelf on the magwel that uses a slightly different clipped lower trigger housing. Easy fix, or HKparts is coming out with SP5K specific trigger housings for the SP5K.
 

·
Registered
Joined
·
1,310 Posts
I think I posted this picture in another thread, but you can see that the receivers are pretty much identical - The only difference (besides the shelf) that I see, is a protrusion on the SP5K receiver near the lower left corner of the rear receiver tab. I'm actually kind of curious as to why that's there...anyone know?

 

·
Premium Member
Joined
·
548 Posts
Stock SP5K is classified as a Pistol, legal. Add a Stock and now it becomes a SBR, not legal. (need a stamp)
Not sure that is true. I have a Sig MPX and it came with a brace with a letter inserted that ATF considers it legal with conditions. I cannot shoot it from my shoulder or its a felony. If I shoot from my chest, cheek or hip it is all legal. Stupid I know.
 
1 - 20 of 37 Posts
This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.
Top