These things are really one of the coolest things I have. They are very sturdy and they are very nice to use. The edges on my gun (original G4 A3) were getting annoying and they looked cool so I got them. The only downside is the fact that you have to have two 5.56 rounds or a screwdriver. Then you have to do some funky motion to get them apart.
Its from MagPul- instant cool factor!
The way you get them apart.
-All in all a very good and cool accessory for one's gun
Rating: [5 of 5 Stars!]