AR upper build help

[CBR600]

I am turning my 17inch S&W AR to a 10.5 Inch. I just have a few questions.

1) What is the best way to get my barrel nut out of the delta ring, so I can use it for my new handguard.

2) The barrel does not have any gas block dimples, what is the best way to tell if I lined up my gas block with the barrel properly. I would hate to explode my gun, because I misaligned the gas block with barrel.

3) My gas glock has 1 dimple hole on it, is it necessary to dimple my barrel and utilize the dimple hole?

4) when I am installing the barrel and flash suppressor, should I be greasing the threads with anything?

 

[cr5]

1) youtube search should find you a few how to vids to do that.

2) you can't blow up your gun that way, it the gas block isn't lined up it won't cycle, that's it.

3) I'm not sure I follow you on the dimples, is your gas block pin on style? set screw? or pinch bolt?

4) I don't but a little anti seize wouldn't hurt. Use a new crush washer or a shim kit to time it properly.

And use the proper tools, don't be another one of the guys that comes on here all confused as to how he ruined his new upper trying to put together his rifle.
If you don't have the right tools then buy them or find someone that has them.
Sounds like you need to find someone with a little experience to help you.

Good luck and be careful.

 

[09outlander]

The "dimples" he's talking about is a detent on the barrel 180 degrees from the gas port, they help to center the screws of a gas block.

 

[Cobec]

I've built one AR and encountered a few of these problems so I will try to answer your questions the best I can.

1. I used pliers to pull the spring out of the delta ring at which point the the barrel nut should fall free alternately your could just cut the spring.

2. My barrel did not have dimples either. I installed the gas tube into the gas block and ran the tube through the barrel nut at which point it looked properly aligned. I haven't experienced any problems.

3. Dimple holes should not be necessary. My barrel didn't have them and I haven't experienced any issues with several thousand rounds fired.

4. I greased the threads for my barrel nut with Permatex Silver Grade Anti-Seize that I picked up at Canadian Tire and didn't use anything on my threads for my muzzle brake.

 

[CBR600]

I've built one AR and encountered a few of these problems so I will try to answer your questions the best I can.

1. I used pliers to pull the spring out of the delta ring at which point the the barrel nut should fall free alternately your could just cut the spring.

2. My barrel did not have dimples either. I installed the gas tube into the gas block and ran the tube through the barrel nut at which point it looked properly aligned. I haven't experienced any problems.

3. Dimple holes should not be necessary. My barrel didn't have them and I haven't experienced any issues with several thousand rounds fired.

4. I greased the threads for my barrel nut with Permatex Silver Grade Anti-Seize that I picked up at Canadian Tire and didn't use anything on my threads for my muzzle brake.

Thanks for the pliers trick for number 1). I dont have a dremel tool, so this is the way I got the barrel nut out.

 

[fenceline]

I've had success with mounting tape to the barrel rear of the gas tube, and tape on the rear side of the gas block and marking a pencil line on both pieces of tape pointing to each port hole. Line up the lines on the tape and the ports will be lined up. Remove tape once satisfied with the install.

 

[Suputin]

There is a C clip or circlip that holds the delta ring together. All you need to do is pry that C clip out. No need to break or cut anything.

In most cases the gas block home is bigger than the gas port so it doesn't need to be perfectly aligned.

No need for anti sieze on muzzle threads.