A lovely rifle but not my cuppa...
So here goes...
I handled the 551-2 SWAT SP extensively today, doing a side by side comparison with my 7,62x39 AK-103.
The overall size of the two is just about identical, so is the weight and its distribution with one 30-rd mag in each. The SIG was as expected plenty more ergonomic, points very naturally. The safety wasn't perfect for my thumb, though, and I found little improvement to the middle finger technique I use with the AK. Also, curiously enough, the low back end of the trigger guard really bit the middle finger's second joint of the strong hand.
Obviously the fit and finish of the Swiss is just about perfect, inside and out. There was absolutely no sign of use to be seen, a year-old rifle was literally as new. The magazines were very impressive: sturdy but light, perfectly fitting. No malfunctions with these!
The SIG had a 2 MOA Aimpoint mounted up front on its receiver rail on a very low mount ring. A very good combination.
So how did it shoot? Very accurately and comfortably indeed. Duh. The trigger spring had been altered to just about 1kg pull and all aftertravel was eliminated. Absolutely lovely.
However, comparing the two proved their behavior under recoil surprisingly similar. The AK has a slide buffer and a usual AKM compensator whereas the SIG has a birdcage-style flash hider, permanent. To accommodate rifle class measurement requirements of Finnish law, the barrel needs to be over 400mm long - with the flash hider this is 411mm. The collapsible stock was also pinned for the same reason, as the overall length of a rifle can't go below 840mm.
It seems that the moving masses in the two rifles are somewhat similar. I managed some impressive double taps with the SIG but that I'd mark as an effect of the superb trigger. Besides that I found remarkably little to differentiate between the two! And for the price of the SIG I could get another four AKs.
So I guess it'll be an AR for me then. I want to go even lighter for manouverability plus I want even less of a recoil impulse, without any of the shake, rattle & roll of the AK action. A caliber change will be in order as the 7,62x39 trajectory gets rather tricky to manage beyond 250 meters.
But if I ever have the extra money, I'll still get me one of these or even a 552. The SIG is just a very impressive piece of equipment. By then I'll have to get registered as a collector to avoid some of the red tape involved in obtaining a SBR. And go substantially up in income
The guy selling the rifle was a true gentleman, very polite and straightforward. He wouldn't even let me pay him for the ammo, even when it was clear that I wasn't buying the rifle!