Originally Posted by
JoshNC
I am a fan of both firearms, but if I had to choose it would be the SIG 553 no contest. I own rail and diopter model SIG 55x rifles and personally prefer the railed receiver. That said rail vs diopter is a personal preference. The diopters are amazing, like they make HK diopters seem crude. If you go with diopters, definitely add the aluminum B&T optic rail. The quad rail aluminum handguard is a necessity in my opinion. If you plan on using a suppressor, you will want the 4-position gas valve. As for stocks, my preference is for the folding/collapsing Swiss stock. I also prefer the steel lower.
Since you’re leaning toward a diopter model 553 LB, I would go with green furniture, gray finish, steel lower ala StG 07.