Again, thanks to one and all. Case, do you know which rail I would get for my M4? That is, is their a specific part number?
Am I reading you correct...you install the rail, then the side saddle unit clips to the rail? I like the model you put the link for and can also see advantages (mainly cost) to the Mesa unit. Are there any particular models of M4 I need to know about before getting a rail/side saddle? All I know is "M4" but wanted to be sure there there wasn't some additional model number or configuration I'd need to know about before ordering. All I knew was I asked for an M4, got it went to the range and fell in love with it the first shot out of the pipe.