Officially licensed by Daniel Defense, Madbull Airsoft gives you the RIS II Rail system best suited for M4 Carbines as CQB length handguards. These rail systems require no modification to the base weapon (M4), they simply drop on. RIS rails are available in different length versions making the different models appropriate for use with full length M4A1 carbine length weapons as well as even shorter CQB variants (i.e. 10.5 inch barrels).
With their aggressive lines and classic styling, their Aluminium build makes them robust and bold looking in design but the material use makes it lightweight.
That all said, G&P M4s have been known to have some fiddly issues with installing barrels when using Madbull DD rails and although it will still fit as is, using a Madbull DD rail barrel nut (MB-BNUT-DDRGP) does make life a little bit easier.
This RIS comes with an attachment bracket with screws and a barrel nut.