I bought this for my TSD m4. i don't recommend that u get it for an m4 UNLESS you have an extended barrel on it or something, eg. i put a silencer on the end of my gun and now it looks like a beast! I took it into my local Airsoft store cuz i got a 9.6v 3600 mah battery and it wouldn't fit inside my full stock, so i wanted them to drill a hole in the stock so i could stick an external battery pack on there and have only a little bit of wire showing. and right as i walked into the store everyones eyes were fixed on my gun, some guy even came up to me and said dude that thing looks sweet!
the only thing i had to do was saw off 2 little parts on my TSD barrel so the threaded ring could fit over my outer barrel.
No barrel wobble
Metal!!! VERY cheap for a metal free floating ris!!!
only one i can think of is...
you may have to modify your gun to make it fit correctly. O AND one more, when or if you hold ur gun by the mag, the little things that u mount stuff on to is sorta sharp and rubs on your hand... no big deal just wear gloves or get a vertical rail grip thingy!!!
Rating: [5 of 5 Stars!]