Updating -moved my carbine port to rifle length gas porting, after fine tuning the adjustable gas block some more, I am able to run the Carrier mod on my bolt carrier and it cycle the factory ammo just fine, also 50 plinking rounds down the pipe without a malfunction. Actually very gentle recoil compared to the carbine. It handles the "magnum" rounds very well too. I look at the bolt carrier after each outing and no signs of the jb weld cracking or the slug moving.
I get a lot of confused stares at the range when I am talking about a side crimp, lead carrier weights, and extending the port length, let alone the reloading aspects of the 450.
No, its not just another AR