M16A1 Barrels

HK41

HK41

Member
Green Mountain Barrels lists Jo-Brook as one of their Canadian distributors. Can you bring us in some of their M16 A1 5.56mm 20" 1:12 twist 20" Barrels?
 
Canada ammo has some 20" barrels. I asked and they are supposed to be a1 specs. May go for it and try it for my m16 parts kit build

https://www.canadaammo.com/product/detail/dominion-arms-da-556-20-barrel/
 
Chinese looks like our only option. Green Mountain will only sell to Canadians through their Canadian distributors and these distributors either don't answer emails (or forum questions) or won't import them. After I vowed not to buy anymore Norc firearms/parts after getting stuck with an over indexed M305.
 
HK41 said:
Chinese looks like our only option. Green Mountain will only sell to Canadians through their Canadian distributors and these distributors either don't answer emails (or forum questions) or won't import them. After I vowed not to buy anymore Norc firearms/parts after getting stuck with an over indexed M305.
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haha same with me, but these may actually be closer to factory than anything else seeing as the chinese just outright copy with zero changes. the fsb is .625 as well. i have one on the way...
 
finding a .750 A2 front sight gas block for my other barrel, at a reasonable price, took a lot of research, how about the .625 A1 FSB, seems it would be almost impossible to find, any source for this part (other than the parts kit another seller had)?

Is there a way to shim a .750 and how, and that it would be safe and reliable?
 
Numrich has .625" FSB.

Colt, DD, BCM, even Bushmaster, obviously have a source(s) for .625" FSB. Getting them to sell you one separately may not be possible though.
 
gunnuts said:
finding a .750 A2 front sight gas block for my other barrel, at a reasonable price, took a lot of research, how about the .625 A1 FSB, seems it would be almost impossible to find, any source for this part (other than the parts kit another seller had)?

Is there a way to shim a .750 and how, and that it would be safe and reliable?
Click to expand...

Two simple machined rings?

Pardon me for interfering in this thread, I don't have any experience in building AR-15s, just shooting & cleaning them. Tony
 
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gunnuts said:
finding a .750 A2 front sight gas block for my other barrel, at a reasonable price, took a lot of research, how about the .625 A1 FSB, seems it would be almost impossible to find, any source for this part (other than the parts kit another seller had)?

Is there a way to shim a .750 and how, and that it would be safe and reliable?
Click to expand...

fat tony said:
Two simple machined rings?

Pardon me for interfering in this thread, I don't have any experience in building AR-15s. Tony
Click to expand...

Anything is possible with the right tooling & machining experience ,
Could it be done ? yes
Is it practical to do ? No
There is a more involved than just making a spacer .
Indexing gas port hole , cross pin holes .
 
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