I'm sure there are.
The 13" SCAR-H is used with the AAC 7.62SD by our servicemen so lucky to get one.
The 762SD was replaced by the SDN-6. The SDN is all inconel construction whereas the 762SD had an inconnel blast baffle and stainless baffles. I am guessing that there have been some erosion issues with the 762SD on the short SCAR barrels. Mike Mers has stated both cans are good on barrels as short as 12.5 inches.
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"9mm has a very long history of being a pointy little bullet moving quickly" --Sevens
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