HK MP7A1 (PDW) sights
Not a review, as these sights are not widely available (if at all), but shown here just for reference, and the fact that I could find no good photos of these sights anywhere on the internet. Even though these sights were designed for the HK MP7 A1 PDW, I found that they function just fine for the M4 as back-up sights. They’re similar in design and function to the Knights 300M rear BUIS and their front rail-mounted flip-up. A spring loaded plunger holds them in the up or down position – there’s no lock. The MP7 sights include pistol-type sights when folded down – there’s a front sight blade and rear, which can be used on the MP7 when no optics are mounted. On the M4, the pistol sights are too low to be used, but they’ll work on weapons with a higher top rail. The sights clamp to the rail and are tightened by a philips head screw.