"MRR" which one?

C

CODFan

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Which MRR are you buying and why? 11.6", 16" or 18.6"

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I'd love to know what kind of performance each gun gets accuracy wise. If the MRR18 can seriously outperform the other two with its longer, non-chrome lined barrel, then that would be where my money would go.
 
for me the 11.6" would be too blasty and the rest have an improper length gas tube.

Might sell my IUR for the 14.5" if/when it comes out (probably what every IUR owner is thinking)
 
None of them. Colt Canada and its distributors screwed over 'early adopters" at every turn with their sales of the SA "limited edition" rifles and carbines. Fool me once, etc, etc..... By all means enjoy your new MRR rifles. Just don't be surprised when the MSRP drops a couple hundred $$ if initial sales are slower than projected...
 
SigWig said:
for me the 11.6" would be too blasty and the rest have an improper length gas tube.

Might sell my IUR for the 14.5" if/when it comes out (probably what every IUR owner is thinking)
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Do you suppose that CC maybe, just maybe, engineered the rifles to use this length of gas tube?
 
Yes you can make any gas tube length work, you just need to plug the variables into the fluid mechanics formulae

But mid length and rifle length gas system will always take longer time to pressurize the system and initiate the extracting cycle. The peak pressure at the gas port will always be lower. You are tapping the gas at a higher velocity with a carbine system, and gives its a shorter path to travel. There is no reason to do that other than cost saving from standardization.

The advantage of using one gas system is obvious- you only need one jig to install gas blocks for all barrel lengths and one gas tube to stock.
 
But that's a perfectly legitimate reason to do it so long as the performance and reliability of the rifle isn't affected. The assumption being made by those in the "incorrect gas length camp" is that the carbine length tube is a liability. I trust that the engineers at Colt Canada know what they're doing. They wouldn't risk their reputation on an inferior product.
 
The Joe-Man said:
But that's a perfectly legitimate reason to do it so long as the performance and reliability of the rifle isn't affected. The assumption being made by those in the "incorrect gas length camp" is that the carbine length tube is a liability. I trust that the engineers at Colt Canada know what they're doing. They wouldn't risk their reputation on an inferior product.
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I don't think there will be a reliability issue. The C8 is reliable, so there is no reason the 18.5" is not reliable. Colt Canada figured out the chamber modification long time ago to make the carbine gas system tick with earlier extraction initiation.

One thing for sure, you cannot expect a carbine gas system shoots as smoothly as a rifle gas system, or even a mid length carbine gas system. It is just physics. It taps the gas earlier at a higher speed and keep the system pressurized longer.

It is kinda like, you can use a big hammer to pound the stake in, and it works well if you chamfer the hole. But you know what, you can use a small hammer to do the work and it is less tiresome to do the work. But the boss just wants to buy 1 size of hammer.
 
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