This is way more practical for an AR but it really depends on your use case. Ive the 5x on my AR and I love it, it works both eyes open CQ and reaches way the fuck out there. Ive consistently hit steel at 400+ yards. The long range capabilities are far superior to a 3x magnifier and dot. Ive got the Romeo & Juliette combo on my AR9 and its great for that.