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Centerfire Rifles - Semiautomatic or Gas Operated Centerfire rifles, carbines and other gas operated rifles.

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  #1  
Old 01-14-2013, 9:52 PM
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Default Building an upper, what else do I need?

I have a receiver.
I know I still need a bolt carrier group, charging handle, and hand guard.
I have this barrel: http://www.riflegear.com/p-1611-fn-1...ed-barrel.aspx

How do I know what gas tube length to get? Does the word carbine tell me?
Any gas block will do?

And I'm looking at ordering these parts:

Forward assist
http://www.midwayusa.com/product/787...la=ProductDesc

Ejection port
http://www.midwayusa.com/product/888...la=ProductDesc

Delta ring pack (with snap ring, weld ring, and delta ring)
http://www.midwayusa.com/product/136...la=ProductDesc

Barrel nut
http://www.midwayusa.com/product/748...la=ProductDesc

Ejection port cover clip ( is this the C-clip?)
http://www.midwayusa.com/product/556...la=ProductDesc

Do I need this tool?
http://www.midwayusa.com/product/294...la=ProductDesc

Thanks!!
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  #2  
Old 01-14-2013, 10:51 PM
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The barrel nut wrench you listed is for 308. You need one for 5.56 barrels.

Also chose the barrel nut that jives with the handguard type you want. Riflegear should carry all the parts you want.
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  #3  
Old 01-14-2013, 11:00 PM
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Oh ya good catch thanks.

Thanks for everyones help! Don't know where some of the responses went but I think I absorbed them pretty well.
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Old 01-14-2013, 11:30 PM
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I'd just get a multi AR tool. You have a carbine gas system on that barrel. You can get any gas block that will work with the handguards your planing on using. Since it sounds like your looking at using a 2 piece handguard I'd get a F marked FSP if your upper receiver is a flat top and pin it.
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Old 01-15-2013, 12:01 AM
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Hold off on the delta ring and barrel nut purchase until you decide on a handguard. Some handguards don't need a delta ring or use a different type of barrel nut and usually come with what it needs to be properly installed.
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Old 01-15-2013, 12:16 AM
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You also probably want to decide what muzzle device you would like to go with - Flash hider, Brake or Compensator
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  #7  
Old 01-15-2013, 7:18 AM
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Ok Thanks for the info!
So I'll hold off on the delta ring and barrel nut.
Just googled flash hiders, brakes, and compensators. Not sure which one I'll go with just yet but maybe a compensaotor.

Do most AR15 need the flash hider/comp/brake welded? I'll check the flow chart but I think it has to do with overall length right?
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  #8  
Old 01-15-2013, 8:10 AM
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Quote:
Originally Posted by Frozenguy View Post
Do most AR15 need the flash hider/comp/brake welded? I'll check the flow chart but I think it has to do with overall length right?
Only if the barrel length is less than 16". If over 16", it can be removable.
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Old 01-15-2013, 11:10 AM
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Quote:
Any gas block will do?
Make sure the inside diameter of the gas block is the same as the outside diameter of the barrel where the gas port is. 0.75" is the standard size, but there are some variants.

Also make sure you have the gas block roll pin for the gas tube. Some tubes come with the roll pin, some do not. You may want to buy a gas block/front sight post plastic tool thingy.

Don't forget to put grease on the upper receiver's threads.

Last edited by Eargasm; 01-15-2013 at 11:17 AM..
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  #10  
Old 01-16-2013, 5:28 PM
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So if I just start with this hand guard: http://www.bravocompanyusa.com/M4-Ha...m4%20black.htm

Do I need to get a barrel nut and delta ring assembly?
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  #11  
Old 01-16-2013, 5:37 PM
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I don't see a gas block. You will need a punch for the gas tube roll pin. Also a torque wrench for barrel nut wrench, set for 40lbs, then index for gas tube. I like to use a gas tube alignment gauge... because I want PERFECT carrier key/gas tube alignment. Also, high temp antiseize paste for the barrel nut. Since you're doing this yourself, either a VLTOR or Daniel Defense CLAMP gas block. Then some Permatex high temp thread locker for gas block bolts.

Last edited by missiontrails; 01-16-2013 at 5:41 PM..
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  #12  
Old 01-16-2013, 5:41 PM
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Granted it's the last step, sights or a scope would help.

Yeah, i'm a troll...
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I fight for the Inner Sphere on the side BTW...

Anyway...here's a dearth of reasoning to ponder: http://en.wikiquote.org/wiki/Guns

Last edited by Swagman00; 01-16-2013 at 5:45 PM..
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  #13  
Old 01-16-2013, 6:36 PM
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Quote:
Originally Posted by Swagman00 View Post
Granted it's the last step, sights or a scope would help.

Yeah, i'm a troll...
Lol. I have to do it sometime.

Are the Magpul gen2 flip up sites really just back up or can they be good for non scope sites?
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  #14  
Old 01-16-2013, 11:46 PM
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Quote:
Originally Posted by Frozenguy View Post
So if I just start with this hand guard: http://www.bravocompanyusa.com/M4-Ha...m4%20black.htm

Do I need to get a barrel nut and delta ring assembly?
You will need the standard barrel nut and delta ring assembly for these handguards.
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Americans who seek to take away liberty and property from others are not true Americans. You cannot be an enemy of freedom and be an American.

Americans who are not self-reliant and depend on government to take care of them are not Americans. You cannot depend on government and be free.
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Old 01-17-2013, 6:28 AM
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that handguard will not gonna work on your barrel, you need free float handguard on that barrel.
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  #16  
Old 01-17-2013, 7:05 AM
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Quote:
Originally Posted by bryant View Post
that handguard will not gonna work on your barrel, you need free float handguard on that barrel.
Ok thanks. Why is that? Or what tells me that so I can look out for it in the future.
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  #17  
Old 01-17-2013, 7:15 AM
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Quote:
Originally Posted by Frozenguy View Post
Ok thanks. Why is that? Or what tells me that so I can look out for it in the future.
My instructions above set you up for a free float handguard. There are SO many... I have used the Midwest Insustries Gen 2 free float system, it mounts right into the barrel nut, has 4 QD sling sockets, and has Knights cuts for Knights rail panels.

Here is the MI forearm.. DO NOT CONSIDER GEN 1.


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  #18  
Old 01-17-2013, 7:24 AM
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the handguard you pick is split in two you need front fix post gas block to hold the handguard together and barrel is pick is flat base. what you planning for a gas block?
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Old 01-17-2013, 8:16 AM
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Frozenguy, you don't NEED a free-float handguard. If you want to use the handguards you posted, the standard barrel nut and delta ring will not only work, but they'll be required. Bryant is right in that you will need something to hold the front of the handguard together. A fixed post gas block will work fine, but if you don't want a fixed front sight, consider one of these:

http://www.riflegear.com/p-772-jd-ma...block-556.aspx

I'm running one of these on my carbine with the exact same handguards you posted:

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Americans who seek to take away liberty and property from others are not true Americans. You cannot be an enemy of freedom and be an American.

Americans who are not self-reliant and depend on government to take care of them are not Americans. You cannot depend on government and be free.

Last edited by noob_tube; 01-17-2013 at 8:26 AM.. Reason: added picture
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  #20  
Old 01-19-2013, 8:35 AM
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Ok thanks does what you guys say about the standard handguard apply to the magpul version of the standard handguard?
Required: std barrel nut, delta ring assembly, and fixed post gas block?
http://palmettostatearmory.com/index...15-rifles.html
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  #21  
Old 01-19-2013, 11:39 PM
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Same requirements. The magpul carbine handguard will fit perfectly.

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Americans who seek to take away liberty and property from others are not true Americans. You cannot be an enemy of freedom and be an American.

Americans who are not self-reliant and depend on government to take care of them are not Americans. You cannot depend on government and be free.
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