For what it’s worth, I’ve had about a handful of orders make it to my doorstep in under four weeks. I’d have to check to be sure but I think I have four more knives on the way and I’ll be sure to report if they take longer than expected to get here.
That's why you need to check your Customs regulations (and state laws regarding knives), spring assisted openers are kinda' a grey area (as they're bordering on a flick knife style) but the axis lock style shouldn't present an issue.
I just picked up my Navy K-506. The finish is a bit unusual and it's a mid-sized knife but it fits my large hands pretty well. I don't think any of the HK-based retailers sell the K-506. I got it off eBay. The seller classicalworld8 sells these for $12.95 but did accept my offer of $10.55 with free shipping. Oh, and it's an actual flipper, ie. not assisted in any way, albeit easily flickable, if that's even a word, but as always, check your local and state laws first, pants before shoes, no running with scissorcs, etc. ;)