r/canadaguns • u/Marauder934 • Jun 22 '26

Feets / Collection / My build Upgraded/Replaced HK barrel

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Just installed an HK threaded barrel on my USP (SD variant) - that O-ring is tight and a nice upgrade. Any Canadian available attachments ?

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u/Rickles84 Jun 23 '26

I don’t understand why HK didn’t just making their frames with standard pic rails. 

1

u/Marauder934 Jun 23 '26

HK said “nein, figure it out”

1

u/user577us Jun 25 '26

"Rails" on firearms didn't exist at the time it was developed. The USP (MK 23) was one of the first firearms that had an accessory rail. The industry settled on a common standard later. Just like Glock cross slots aren't true 1913 sized.