I used the steyr adaptor and a swift stumpy modular. Just the front and rear sections with all the middle sections removed.
Quiet enough for the range or for hunting.
I sold mine to Neil180 on here and deeply regret doing so.
Don't rule out the manual version (mine was manual). Capable of putting 5 shots in a bull in as many seconds without changing hold or head position. Capable of firing a second hunting shot as quick as you can think too. I wouldn't have the SA. I can't imagine needing to fire quicker than the manual can achieve. But do get the scout. The full length is too long.
The stock on the H5 looks like a plank but seriously the most comfortable stock I've ever had on a rifle.They're not heavy anyway but as soon as you shoulder it, the weight disappears