Aluminum Alloy Detachable Front Sight with Hex Wrench for M40 + More

Pros: Well its cheap and easy to put on.

Cons: The front sight post (the little pin that you actually line up with a rear sight for aiming) is crooked. Very crooked. The hole it screws into was probably drilled crooked. I could probably bend it with pliers, but it adjusts by rotating, so that would just make it worse if I had to change the elevation. The bottom area where it mounts to a rail is a little beefy for rails that don't have enough space below the teeth. If the ridges in a picatinny rail aren't deeper than the outside edge, this will not fit on it properly.

Other: Probably fine on a paintball gun or airsoft toys. I was thinking of using it a back up sight for a rifle, but I would probably be better shooting from the hip.

Pros: Excellent Sight for my HK416 Airsoft Rifle, allows you fast install locations on the forearm of weapons (to picatinny locking slot - the spacing of slot centers is 0.394in. (10.01 mm)) so as not to discomfort with his retention, the included hex key allows you fast and secure fixate the Front Sight in the airsoft rifle

Cons: No cons.

Other: Recommend to buy, do not miss it!