IUR receiver weight?

[Clvland]

I was wondering if anyone knows what the weight of the IUR is without the barrel( but with the barrel nut). How does it compare weight wise to a standard upper receiver and bolt on quad rail?

 

[BioPace]

Not many people have removed the barrels yet.

I can't find the weight of a complete upper, with or without BCG/ch but CC says 7.45lbs for a complete rifle.

 

[Hoag]

Just a thought but wouldn't removing/replacing the barrel kind of defeat the whole Integrated part of Integrated Upper Receiver? If you wanted to replace the barrel, why not just get an upper that is designed to have the barrel easily replaced.

 

[r_taylor]

The barrel is easily replaced. Just needs the correct wrench. I just replaced one and the whole process takes less than 20 minutes.

 

[RobertMcC]

Goto CT and they had food scales that handle up to 11lbs for 10$ on sale

 

[bsand]

Were did you get the wrench from?

The barrel is easily replaced. Just needs the correct wrench. I just replaced one and the whole process takes less than 10 minutes.

 

[Canadian eh!]

Were did you get the wrench from?

Barrel is pinned through the receiver. It is not just a wrench thing. Perhaps the poster was thinking of the sa 20 and sa 15.7 models with handguards?

 

[bsand]

Yeah probably, as cc uses a special barrel nut socket not wrench. Cool part is the gas tube is held in place by an Allen key plug. So hardest parts would be actually reassembling the barrel/nut and gas Block on the new barrel. Other than taperpins for new barrel.

 

[r_taylor]

Yeah probably, as cc uses a special barrel nut socket not wrench. Cool part is the gas tube is held in place by an Allen key plug. So hardest parts would be actually reassembling the barrel/nut and gas Block on the new barrel. Other than taperpins for new barrel.

The gas tube is held by the same role pin as a standard AR/C8. The Allen bolt is there to be able to push the tube out if it is stuck in the gas block. There is also a small roll pin that locks the barrel nut. Removal of the gas tube is not required as it comes off with the gas block as a unit before removal of the barrel. The tool is about 24" long and has a mated castle nut on the end. I have replaced a few barrels most recently one last week with a 10.5".

The hardest part of the barrel swap I removing the thin aluminum heat shield without scratching or denting it. There is a technique to its removal.

The barrel can not be removed/replaced without the proper tubular wrench.

 

[r_taylor]

Barrel is pinned through the receiver. It is not just a wrench thing. Perhaps the poster was thinking of the sa 20 and sa 15.7 models with handguards?

It is a tubular wrench about 24" long that fits over the barrel and engages the barrel nut. The roll pin secures the barrel nut. It is easily drifted out using a standard AR roll pin punch designed for the gas tube roll pin.

 

[Clvland]

It is a tubular wrench about 24" long that fits over the barrel and engages the barrel nut. The roll pin secures the barrel nut. It is easily drifted out using a standard AR roll pin punch designed for the gas tube roll pin.

So since you do barrel changes on the IUR, could you tell me if the gas block on the 15.7 barrel is reused or is a new gas block needed? Can a standard low pro gas block be used or only the CC block?

 

[r_taylor]

So since you do barrel changes on the IUR, could you tell me if the gas block on the 15.7 barrel is reused or is a new gas block needed? Can a standard low pro gas block be used or only the CC block?

The CC gas block pin spacing is wider than standard gas blocks. Its easiest to use a standard gas block and replace the gas tube with a standard carbine one. Another benefit is lighter weight as as the CC one is certainly a heavy piece.

 

[Clvland]

Thanks for the reply. That's good to know about the gas block and tube. Would you be able to weigh the IUR, heat shield and barrel nut the next time you do a change?

 

[r_taylor]

Thanks for the reply. That's good to know about the gas block and tube. Would you be able to weigh the IUR, heat shield and barrel nut the next time you do a change?

Will do. I think the IUR is certainly lighter than a standard AR upper, delta ring/barrel nut, and say a KAC RIS.

 

[Matt K]

There is definitely no roll pin that retains the barrel nut.

It is a tubular wrench about 24" long that fits over the barrel and engages the barrel nut. The roll pin secures the barrel nut. It is easily drifted out using a standard AR roll pin punch designed for the gas tube roll pin.

 

[bsand]

I'm pretty sure he's csc's gun smith that does iur's rebarrels. So he would be the one to know.

There is definitely no roll pin that retains the barrel nut.

 

[Bolivar]

Yes, Matt would know.