I have an M4 style carbine, if I remove the front site entirely, could I install a full length picatinny rail system? To make it into a dissipator style rifle? Would I need anything else to do this? Thanks!

Your barrel is 16" right? And the full length rail you want to put on is 12" (or so). Long as you install a gas block that fits under the rail system, should be ok. Now, I'm a noob and I don't have a  carbine (yet, still building it though) but from what I understand, should be no problem.

Make sure you post pics..

Gene

Correct, it is a 16" M4 profile barrel. A Gas block huh? Alright I'll start shopping!

you could always cut the fsb down to make your own low pro gas block

Quoted: you could always cut the fsb down to make your own low pro gas block

You can do that too. I cut mine down with no problem but, I would like to give you a small piece of advice: go on the EE and buy another fsb to cut down. I've seen them for as low as $10.00.

Why should you do that? In the future if you ever want to change the set-up on your rifle and decide to go back to a standardFSB you may end up having a hard time getting one that lines up perfectly with your barrels taper pin holes. Since most FSB's are drilled (and thus "matched" to each barrel), save the one that goes with that barrel and buy another one to cut down.

Ok, that's my 2 cents.

Good luck with your build.

Gene

Quoted: Quoted: you could always cut the fsb down to make your own low pro gas block You can do that too. I cut mine down with no problem but, I would like to give you a small piece of advice: go on the EE and buy another fsb to cut down. I've seen them for as low as $10.00. Why should you do that? In the future if you ever want to change the set-up on your rifle and decide to go back to a standardFSB you may end up having a hard time getting one that lines up perfectly with your barrels taper pin holes. Since most FSB's are drilled (and thus "matched" to each barrel), save the one that goes with that barrel and buy another one to cut down. Ok, that's my 2 cents. Good luck with your build. Gene

Nice idea.