Thanks for the vids!
I’ve noticed over the years the use of muzzle brakes and comps (even being machined or welded at the edge of the barrel) has become more and more common for the heavier caliber sniper guns and “assault rifles”.
I used to own a Saiga 12 and I remember shooting slugs through that thing. It felt like a ram was running into my shoulder with each trigger pull. I wasn’t a small guy back then either at 225lbs, but I also didn’t have a comp/brake attached.
I still have my Saiga 12; with 00 Buck it’s actually the softest recoiling 12 gauge I’ve ever fired. I’ve got it converted from that bad sporter stock back to a pistol grip and folding stock, as most people do. I don’t have a brake or compensator, but I’ve actually found that with the 5 round stick mag I can actually hold the thing like an oversized pistol and empty the mag with reasonable accuracy one handed. You’re right about the recoil being worse with slugs, though; can’t use it as a ‘big pistol’ with those.