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AR15 Handguard compatibility

Posted on 10/28/20 at 2:54 pm
Posted by jlovel7
Louisiana
Member since Aug 2014
21351 posts
Posted on 10/28/20 at 2:54 pm
I'm potentially building an AR15 upper or just buying a pre assembled one. What do I need to know about handguard compatibility? Do only certain types or sizes work with certain upper receivers? Or do you just use adapters? New to this so not really knowledgeable at all on how they come together.
Posted by bbvdd
Memphis, TN
Member since Jun 2009
25074 posts
Posted on 10/28/20 at 2:55 pm to
Most will have their own proprietary barrel nut. Just torque it on and install.
Posted by Flats
Member since Jul 2019
21887 posts
Posted on 10/28/20 at 3:36 pm to
quote:

I'm potentially building an AR15 upper or just buying a pre assembled one.


Keep in mind you'll need a few extra purchases if you want to assemble your own upper. Torque wrench if you don't already have one, AR vice block, probably an armorer's wrench.
Posted by SneakyWaff1es
Member since Nov 2012
3941 posts
Posted on 10/28/20 at 5:26 pm to
You also need to buy a gas block that will fit under whatever handguard you buy. If you go with an fsb, make sure the handguard is the right length.
Posted by armsdealer
Member since Feb 2016
11533 posts
Posted on 10/28/20 at 5:39 pm to
If this is your first rodeo, you don't want to buy all the proper tools (way more than what has been listed) or you are not going to do a bunch just buy something complete from a reputable company.

SOLGW and LMT are my go to for defense rifles right now, Larue UU for precision oriented rifle. Larue will assemble their UU kits for free.
Posted by 90Delmore
Member since Feb 2006
260 posts
Posted on 10/28/20 at 5:47 pm to
Some Handguards (Aeroprecision) won’t work with billet style upper receivers
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