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FAB Defense Heckler & Koch MP5K Aluminum Picatinny Rail System
$282.00 $228.49 Save 19%
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Good with Caveats

by PickleMan, Verified Owner from FL, United States Written on October 9, 2025
The rail itself is good, but it requires significant filing to work on an HK SP5K. It’s also necessary to chop the front of the rail back by one picatinny slot to unblock tri-lug mounting. Otherwise only direct thread mounting is available.
Would recommend: No
Was it helpful to you? Yes | No

Item Didn’t Fit.

by Gary, Verified Owner from MI, United States Written on January 26, 2025
Item was well built however, it did not fit the particular model I own.
Pros:
  • cost
  • Availability
Cons:
  • did not fit
Would recommend: Yes
Was it helpful to you? Yes | No

MKE AP5-P (MP5-K Clone) May require fitment/modification.

by DK, from CO, United States Written on March 16, 2023
Works great! After removing the sling loop, filling it close to the sight tower it was a very tight fit. I also had a small hang up on the bottom of the reciver but weld, after removing a very small amount from it, because the chucking tube hanger wasnt lining up, the rear of the handgaurd was able to clamp the reciver/trunnion. The 3 lug portion of the barrel is covered halfway, ID of the end of handgaurd is about 1 3/8". Total over length of the handgaurd is 4 1/4" , length from front of the trunnion to rear of the handgaurd is 9/16", length from front of trunnion to end of the handgaurd is 3 11/16".
Pros:
  • very solid
  • Accessories
  • Holds zero
Cons:
  • Modification likely needed
Would recommend: Yes
Was it helpful to you? Yes | No
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Last updated 2025-11-12 UTC.