In short action likely so since the Hawkins Hunter in SA accepts standard AICS mags. I also use Hawkins mags in SARV and Mack Bros M5 bottom metals with no issues.
Potentially, the Hawkins mags tend to run a little thicker than a standard aics mag. I have used them in the greyboe flush bottom metal without issue. Worst case scenario you can sand the mag body down to fit. I had to sand mine to get it to fit in a HNT26.
Hi There! Our short and medium length Hunter flush magazines are AICS compatible, so technically they should fit in any flush-style M5 bottom metal that is short or medium length.