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I'm still grappling with the realization of how difficult it is to get an AR15 barrel that meets my spec requirements in Canada.

More on topic, I already have a JP LW BCG and a Brownells LW nickel boron as my spare. I've already drank the LW BCG koolaid.
 
I would have definitely bought that BCG if I didn't have other items on my list that I wanted first.

Thats a screaming deal, Maybe it will happen again soon or next year.
 
Blastattack said:
I couldn't disagree with this more. You don't reduce carrier weight to just turn around and add it to the buffer. That's ridiculous. You reduce the weight of all the moving components to reduce the impact of the bolt and buffer reaching the end of travel, and you use the adjustable gas block to give you just enough gas to move those components and not a smidge more.

The only reason that all that mass is there is to reduce the rate of fire in a fully automatic firearm and make a firearm that is very tolerant of a wide variety of ammunition and environmental conditions. An M16 that ran 1200+ RPM would not be a terribly effective or useful firearm, nor would it be terribly tolerant of various conditions. However, in a lightweight/race gun, you don't care about any of that. You're not firing full auto (because firstly it's entirely useless in 90%+ of situations, and also not legal) and the firearm does not need to tolerate a wide variety of conditions, only the exact conditions that you are immediately facing. You run that gas block 1-2 settings above failure, and you get a firearm with no recoil, fast follow up shots, and absolutely no jump, drift or kick in any direction. The thing just stays put.
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That will work with a 556 gun, but it is a whole other ball game on a big bore ar like my original post states.

The gas blocks I have used do not have a setting where it completely closes all the gas from going down the tube. When big bore barrels are made, often they are guessing when they select the size of gas port and they assume you are running a full weight carrier.

So for example, real world, I want to build an AR chambered in rem 30ar. I go with a light weight carrier, buffer and adj gas block, but even with the block on its lowest setting, the carrier is cycling too far making the recoil impulse much too violent. The only way to compensate for this is a heavier buffer just like is done on suppressed 556 rifles.

In a perfect world, I would get my barrel without a gas port hole and start with the smallest bit I have and work my way up until I have a rifle that just barely functions with my chosen ammunition, but that takes a huge amount of R&D time that someone needs to pay for.
 
jiffx2781 said:
Please explain how having a barrel made and asking them NOT to drill a gas port "takes a huge amount of R&D time that someone needs to pay for"...

If you have a drill press (even a cheap crap tire one will do) and a set of numbered drill bits (Princess Auto has cheap ones that will do the job) there is no excuse for not being able to do it yourself.

Where is this "huge amount of R&D time that someone needs to pay for" you speak of? All it takes is a bit of your own time to drill and test a few times. Am I missing something?

Seems some people just like overcomplicating things so they can flap their gums (or click their keyboard) just to hear themselves.
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then you have the cost of a custom barrel over one on the shelf and a trip to the range every time the gas port is drilled larger. If you are doing it yourself, then its time, but a smith isnt going to do it for free and has to guarantee their work.

I was surprised to be asked for all the technical specs when asking a Canadian gun manufacturer to build a custom ar, when I couldn't provide them with the specs and they would be forced to do their own testing, they refused
 
jiffx2781 said:
If the manufacturer or gunsmith you approach to do the job isn't competent enough to do it without requiring the customer to provide technical specifications or blueprints etc... then you need to find a different company to work with.
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Canadian manufacturer, who do you suggest for a remington 30 ar build then? Since it was atrs that required me to give them specifications for them to build it and then declined when I said it was up to them to figure it out, do the testing and supply me with the finished product. If I have to do the engineering, design and testing, I may as well build it myself at that point.

Not trying to get into some sort of pissing match, but if you want a custom AR built in canada, outside of a bunch of parts already being manufactured by various companies, good luck.
 
jiffx2781 said:
The lightweight carriers weren't designed or intended for use with the big bore cartridges. If you're trying to do something with a product that it wasn't meant to do then you should not expect an off the shelf barrel to perform properly. Having to get a custom barrel made and putting some time and effort into making it run the way you want it to should be expected. All you have to do is get the barrel made. You don't have to pay someone else to get it running.
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if it's simple and I am willing to pay, why is it impossible to find someone to do it?

I see way too many malfunctioning home brew 556 rifles each year at the various ranges I shoot. I am honestly surprised more people don't get hurt every year. There are people I know that can't change a flat tire or the oil in their car, but are willing to try and build their own rifle.

My time is valuable, I would rather pay someone to do it and give me the guaranteed and tested finished product.

As far as something it was never designed to do, have a look at the titanium bcg from master of arms that has a tunable dead blow system.
 
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