Things I liked: Fit great on these rifles http://www.pyramydair.com/s/m/G_and_G_Combat_Machine_R16_Carbine_AEG/2294
Things I would have changed: Only one swivel stud...but I bought it for the rails, so this was not an issue.
What others should know: Fit's great and a great deal.
Things I liked: I put three of these rails on my new Marauder pistol. I liked these rails having four mounting holes in each rail. I used very short screws, to not contact any of the works under the front grip. The rails are on very solid. They worked out great. These rails also come with a quick detach sling lug built in to the rail.
Things I would have changed: I would have liked for the rails to be a little bit thinner. The grip on my Marauder with the rails and rail covers are about the same size around as an M4 with rails.
What others should know: These are the best rails, I have found for custom mounting applications. They are worth the money.
Things I liked: Easy mounting, easy to use
Things I would have changed: nothing
Are these metal or plastic? I'm looking to glue these to a plastic air rifle stock so I can mount a bipod to it. DON'T want plastic.