ar gas block help

[hemicharger]

Hey guys and gals, I have a s&w m&p15 flat top carbine. I would like to put a longer 4 rail handguard that extends almost the lengh of the barrel. What kind of gas block do I need and do I need a free float handgard since I dont have a front sight?

 

[Don]

Perhaps a low profile one that clears the rail, its going to be a system of trial and error if you buy everything off the net.

 

[hippykiller]

LaRue Tactical Low-profile Gas Block LT-202

Cant speak for the item personally, I just like the way they do business.

 

[obijohn]

my uspsa racegun has a full length free float tube over a 16" barrel. i used a jp adjustable gas block, but any of the plain gas blocks should do. what you'd be looking for would be a gas block with no front site tower or rail. you could also cut the sight tower off of the gas block you have currently installed.

 

[hemicharger]

Ok, I I see that I need to get a low pro gas block. The next step is a handguard. What kind do I need?

 

[hippykiller]

Ok, I I see that I need to get a low pro gas block. The next step is a handguard. What kind do I need?

Honestly that parts up to you, and you budget. They run the cambit from 50-75, on up to 300+. But at the length you want I would expect to pay more in the $300 range. Look around Larue some more... I think they have what your looking for.

8. LaRue Tactical AR15 13.2 Handguard LT15-13.2

 

[hemicharger]

Thanks for your help guys. I now know what to look for. If I find something, I will have a carbine length 4 rail handguard for sale soon.

 

[Slow Hand]

I used a YHM free float lightweight rifle length tube on my 16" midlength AR. I chopped down the otiginal front sight. Took about 20 minutes at most and I already had to take it off to install the stuff for the free float anyways. Since you are going to be using a fore-end longer than where your gasblock/FSB is, you will have to use a free float type of tube. They attach at the reciever only, and don't touch the barrel all the way out.

Here's my rifle awhile back. It looks a little different, but same basic idea.

I live on the West side and would be happy to let you look at mine and/or give you a hand getting yours set up.