https://youtu.be/YAneTFiz5WU?t=153
It seems relevant, at least in the above-linked previous demonstration with an AR, that he finger-swiped the majority of debris clear with "let me get the rocks out of the gun" and then swipes 4 times in 2 different direction.
As opposed to:
https://youtu.be/HYAEGgf_8LU?t=187 wherein there is no finger swipe and a minimal shake.
There are many, many advantages to short-stroke gas piston ARs of quality: and most of them are primarily relevant to organizations and less relevant to individuals. Reduced wear to the operating group, extended barrel life, reduced backpressure when suppressed, and a greater tolerance for shorter barrels and excitable shooting are examples of such. These are in turn counter-balanced by such minutiae as increased weight, altered recoil impulse and\or peak-stacking on the accelerometer, cam-pin gouging, bolt carrier tilt, and the cyclic rate increasing to the point of sync-issues with the ability of the magazine spring to feed in-pace with; the sort of thing that orgs don't mind finessing, for what they take in trade.
The HK 416s have done well for themselves in a range of configurations and places.
The LWRCis.... less so. One Fed LEA in particular has had a pretty broad range of issues with them.