Tdi iron sights - Tdi Arms Flip Up Backup Sights

So I was skeptical about a lower cost sights from a company I never heard of... Ordered a set for backups on a 20 inch varmint rifle and when I got them I was pretty impressed with the quality to price ratio. They are solid aluminum with push button flip up that worked great. They have 3 rear sight settings, 2 are diamond shaped peeps close and far and if you half flip the peep it is a completely open rear apiture with white stripes on the side to line up front sight post for cqb stuff i will never do. I think these are better than the Magpul polymer ones I bought for more money so I ordered another pair and put them on my wife's home defense 7.62x39 ar.