Madbull Daniel Defense 4 inch rail kit, brand new in box for M4 AEG, will fit MWS models if using a barrel adaptor or aftermarket outer barrel, the inner barrel supplied is AEG spec though, so you will need a GBB pistol inner barrel or similar.

Comes with 4 inch railed handguard, 7inch outer barrel, 6.03 AEG spec tightbore inner barrel, steel barrel nut and all bolts and fixings.

Purchased about a week ago for £119 plus postage but too short for my taste.

£65 including postage and PayPal.

(I'm also selling a Laylax MWS outer barrel base that can be used with this to make a Marui MWS based PDW set up, see my other adverts or message for details.)