Matrix 2-Piece Drop In Rail System for M4/M16 Airsoft Rifles (Length: 12")

"Unfortunately I listened to another reviewer that said all you have to do when putting this rail on a G&G combat raider was to remove the mock gas tube. 5 days after it got here I have still not gotten it on here, with the help of a master machinist and a full array of tools. I had to drill holes, use a lathe to mill off about a half an inch and to mill down my outer barrel. I still need to modify it more to make it work.