An HK factory MP5SD gun itself is a "Post Sample" while the suppressor is a "Pre Sample". That said, here is my Qualified RR PP MP5SD. It is as close to HK factory I have ever fired. Actually, the Qualified suppressor is quieter than the HK suppressor.
The only way for a civilian to own a non-post sample MP5SD is to have a conversion done with a transferable sear by the the likes of RDTS. FWIW, I have one of RDTS's MP5SD conversions and the gun not only looks like the real deal but functions flawlessly. Highly recommended.
Bought my Pre '86 dealer sample in 1992 NIB for $1,600, shot it for a bit then thought real hard and sent it to RDTS for an SD conversion. Got it home and installed a three shot lower, and never regreted it! The receiver is stamped 12/72. No lugs are on the receiver, so no optics for me. LOVE the SD!
Tune up on turnaround time? Try 2 weeks last spring for a full blown 53 with 93 rec. conversion, and a 94 mp5 sd conversion he. I could not believe how fast he and his sons did both of my guns! Ralph is one of the best guys on the planet. He has educated me a lot on HKs.
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