I have one. I love it. I've had all the common .308 battle rifles (M1A, HK91, FAL, etc) and like the SCAR best of all. It's as reliable as any, more accurate than most, more ergonomic than all but the AR-10s and I'm not so sure about that, recoil is so mild it makes people laugh the first time they shoot it, it comes with all the goodies like rails and sights, etc.
I've been shooting mine in multigun this year for the hell of it. It's not as fast as a 5.56 AR, but I didn't expect it to be. It's easier to use than any other .308 I've used there.
I've shot it at a friends farm to 600. It did just fine, especially for the 1-4X scope. I have nothing to complain about there.
As a multipurpose .30 cal rifle, you could do a lot worse.
Of the first four people who shot mine: One bought one that day, another bought one later, the third I haven't seen since but he was talking like he might, and the fourth had just used his budget on a Sig 716.
The biggest downside is expense. I have never spent so much on a non-class 3 gun before, but I have no regrets. I like it that much. If you want to justify it, I guess you can. One boring winter day, I added up the cost of the "extras" like the folding sights, adj and folding stock, sling mount points, rails, etc and came up with something like $1100. Add that to the cost of a good AR-10 and you are in SCAR territory or beyond. Of course it doesn't mean much if you aren't going to buy all that stuff, but I said you could try to justify to yourself that way if you wanted
Magazines were the other negative, but that got better last year. When I got mine late last summer, they were becoming available. I had no trouble finding and buying them from about August until Sandy Hook in Dec. I started getting back orders in April and have seen them at decent prices and in stock since May. The FNH eStore had them when I've looked recently. Don't let mags stop you. They are out there.
Some people complain about their triggers. It seems to me they vary. When I got mine, I looked around and basically bought the one with the best trigger. It cost a little more than at another shop, but I haven't felt the need to put $300-400 in another trigger. The Giessles and Timneys are great triggers, but the better SCAR triggers are plenty useable.
Ive always thought a scar 17, is what the 1-6 scopes were designed for.
Ya know, you said a lot there. It really is the first thing I've found to take advantage of/need a 1-6. The SCARs have the accuracy and reach for at least mid-range work (6X), but they are light and fast handling for close and fast stuff (1X). I weighed mine when I got it and it was only 8 ounces more than my old SP1 AR (7lb,2oz vs 7lb,10oz) . That really made it sink in, seeing it was so close to what was regarded as a light .223 for so many years.
This is why I don't get some of the scope choices I've seen on them. Look around other forums, and there are a few low power scopes, but the most common scopes I see are bigger than the scope on my SSG. The 5-20X and 5.5-22X scopes seem pretty common.
To me, one of the big advantages the SCAR has over other .308s is weight. I just don't get taking a compact and freakishly light .308 and adding two or three pounds of scope and rings that are almost as long as the barrel. Many clear ten pounds, and do it by a fair margin. I think they are hurting a lot of it's potential, while not helping it's longer range ability much. If one wants a light precision rifle, there are better, cheaper, and probably more accurate ways.
Very limited window of experience with them so take this with a grain of salt...
In my experience overseas there were a lot of mixed reviews coming from the SOF operators using them. We had one particular one that had horrible "phantom" extraction problems that could never be reproduced in a controlled environment when trying to troubleshoot the issue. Bolt/extractor replacements didn't solve the problem. Did they still use them? Yes, but that's likely because that was either their only option or the "better" option. Also had complaints that during missions the ambi mag-release was problematic. They would often inadvertently drop their mag simply by slinging the rifle and letting it rest against their body/kit. That's a HUGE design problem...
I've done a little shooting with them. I'm indifferent on it. SCAR-16, I'd pass on that all day long because there is very little advantage over current, cheaper, more-available offerings. But .308 battle-rifle the SCAR-17 is one of the better options out there. The only real negatives are price and availability of accessories. You won't see much modification to them because all the parts are proprietary and therefore must be built ground-up a lot of times by very dedicated/skilled smiths. If you're looking for a .308 battle rifle that you don't plan to "customize" much and don't mind the negatives then SCAR-17 is probably a pretty good choice for you.
I was looking at making the ultimate PDW type weapon a while back with 300 BLK. The SCAR-16 was suggested but later ruled out because all of the above. I just couldn't justify the price, special one-off parts I would have to make, and the accessory problems.
Just my 2 cents...
I run into it daily. Its very common for people to over zoom their rifles.
IMO, most people could cut their scope magnification in half. Then look at going some more.