Good question... still not easy to pull parts out of Colt Canada, still dribbs and drabs. At least we have these.
British Special Forces 3rd Gen Integrated Upper Receiver’s from Colt Canada
- Thread starter Nordic Marksman
- Start date
Good question... still not easy to pull parts out of Colt Canada, still dribbs and drabs. At least we have these.
Not at this time.
You can use a bent gas tube on these however. A straight tube is not required.
Gas tube is a wear item that needs replacement before the barrel dies - and to replace the gas tube the gas block has to come out. Those two screws cannot be reused and they need to be replaced.
The regular gas tube is not compatible with the proprietary gas block height designed for straight gas tube.
So if gas tube wears out, where to find maintenance parts? I think these 2 parts need to be accessible to service the large number of MRR/IUR out there.
The regular gas tube is not compatible with the proprietary gas block height designed for straight gas tube.
So if gas tube wears out, where to find maintenance parts? I think these 2 parts need to be accessible to service the large number of MRR/IUR out there.
Not quite correct.
If you have the proprietary Colt Canada gas block for either the SAS upper or the MRR, yes, you need the straight gas tube due to the height, but the gas tube is designed to come straight out. There is a hex head screw on the front side of the SAS gas block to access removal, the MRR does not have the hex screw, the end of the gas block is open to the gas tube and it can be pushed straight through after the roll pin is removed.
I dont have a photo on hand showing the front side of the gas blocks, but in the photo below you can see the SAS gas block (the larger one) and the smaller MRR gas block. The SAS gas block has a hex head screw on the front, the MRR does not, its just an open hole to the gas tube. That's how its removed, you do not need to remove the gas block, only if you are removing the barrel.
As we dont have the proprietary Colt Canada gas blocks available at this time, customers can use a standard low profile gas block with a traditional gas tube if they are building a rifle using one of the barrels or one of the stripped IUR uppers.
In respect to the reuse of the gas block mounting screws, I have never heard they cannot be re-used, but I will ask the question.
They just appear to be a standard cup point grub screw, nothing special to be honest and surely not something special made in house at Colt Canada.
Photo of the screws below:
Thanks for the explanation of the gas tube installation/disassembly. The bit about the screws come from wpn tech servicing this type of uppers for the government.
The straight gas tube is CC proprietary and wearable, and it is a part that I would like to have spares on hand. No one knows if CC parts will be available some years down the road.
If I am planning for 20,000 rounds for an upper, I probably should have at least 1 spare gas tube to complete the life time maintenance package of the upper.
The straight gas tube is CC proprietary and wearable, and it is a part that I would like to have spares on hand. No one knows if CC parts will be available some years down the road.
If I am planning for 20,000 rounds for an upper, I probably should have at least 1 spare gas tube to complete the life time maintenance package of the upper.
I agree about the spares but I'm skeptical about your gas tube wear claim. I'm not sure what you do with your upper, but I'm pretty sure most people aren't putting the upper / gas tube through the intense heat cycles of suppressed / full auto use it was designed for. Everything should last a bit longer in the hands of normal people vs. a mil/govt end user.
r34skyline
CGN Ultra frequent flyer
This is the first im hearing about gas tubes wearing to the point of unservicability in a semi auto gun. The firing schedule must be exceptionally aggressive.
I asked and below, straight from the horses mouth...
First, gas tubes only wear out when they are slightly misaligned. They generally do not wear out before the barrel and often do not wear out at all if they are straight gas tubes which are inherently aligned. It is still a good practice to replace the gas tube when replacing a shot out barrel.
You can replace a straight gas tube without removing the gas block on this system.
Third, the notion that the grub screws must be replaced is ridiculous. They should only be replaced if lost or physically damaged. Otherwise, they work just fine.
First, gas tubes only wear out when they are slightly misaligned. They generally do not wear out before the barrel and often do not wear out at all if they are straight gas tubes which are inherently aligned. It is still a good practice to replace the gas tube when replacing a shot out barrel.
You can replace a straight gas tube without removing the gas block on this system.
Third, the notion that the grub screws must be replaced is ridiculous. They should only be replaced if lost or physically damaged. Otherwise, they work just fine.
Any carbine length straight gas tube will slide right in. These are not a proprietary Colt Canada item.
If I cant get gas tubes from CC, I will import a batch with our next shipment from a US supplier and have them
on hand for those that want a spare.
No prob.
Still waiting on an update myself. I will reach out and find out when we will see them.
IUR/MRR Wrench Project Update
Well, our machine shop just brought us a sample this afternoon.
I love the TIG Weld, its a work of art. I told him not to machine it out. Just too nice not to have on this piece.
Same dimensions as the original Colt Canada wrench, but we opted to use a 4140 chromoly steel for the bit to give it longer service life.
The original tool is not quite as hard as this.
A work of art and made one at a time with love here in Canada.
Its now gone back for a few more tweaks before we start the first production run this week. For a finish, we may Cerakote them.
Enjoy the photos... (of course the black one is the original tool, our's is unfinished)
Well, our machine shop just brought us a sample this afternoon.
I love the TIG Weld, its a work of art. I told him not to machine it out. Just too nice not to have on this piece.
Same dimensions as the original Colt Canada wrench, but we opted to use a 4140 chromoly steel for the bit to give it longer service life.
The original tool is not quite as hard as this.
A work of art and made one at a time with love here in Canada.
Its now gone back for a few more tweaks before we start the first production run this week. For a finish, we may Cerakote them.
Enjoy the photos... (of course the black one is the original tool, our's is unfinished)
Seconded! Approximate cost Nordic?
Tarrantula
CGN frequent flyer
- Location
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Thirded
