I was under the impression that AR15 hammers and triggers are cast using the lost-wax method and then finish machined on the relevant surfaces. I've yet to see a set that looked forged.
Don't bother them with details.

I was under the impression that AR15 hammers and triggers are cast using the lost-wax method and then finish machined on the relevant surfaces. I've yet to see a set that looked forged.

...and provide our customers with the best service in the industry.
I own (2) Colts. Neither of them has M16 bolt carriers by design. We're NOT talking about models available to the Canadian market but those available in the US.
Read the information provided in my last post. It's quite clear what American law is. If the M16 BCG is exempt from these provsions in American law, could someone explain why?
Even if the BCG is a bad example on my part, the premise is still the same. I wouldn't make inferences on Canadian law based on what American law is.
I'm not talking about Canada. Colt was one of the first US companies that started shipping rifles, including those for civilian sale, with FA carriers. This is only within the last couple of years. You don't believe me, that's fine. I did read the ATF links provided and nowhere did it say FA carriers constituted a machine gun. It must be a part, or combination of parts, expressly designed to make it go FA. without the auto sear and M16 trigger mech it won't go FA. The difference in the US is that if you have an M16 part (ie, carrier) and your weapon does doubles on you, then you would be charged with possession of a machinegun if an ATF agent was present. The letter below is from the ATF and explains it nicely.
http://www.gandrtactical.com/images/archive/ATF M16 Letter.pdf
I'll say it again, Colt, BCM and Daniel Defense all ship rifles with FA carriers, that's a fact, not an opinion.
?..I am not certain what unusual wear looks like compared to normal wear. Can you post some pics of what I should look for? Rough idea of round count it would take for this unusual wear to show?
Not sure how long you've been into AR's but Colts for many years came with non-milspec bolt carriers and an auto sear block machined into the lower receiver to discourage the illegal use of their product. Both of my Colts are mid-1990's era AR's. One of them is a pre-ban model while the other is a post-1994 AWB model. Both have the same carrier and auto sear block.
You're right regarding recent production Colt civilian models. I just "Google'd" it and it appears as though they've gotten rid of the sear block and now use FA bolt carriers in their AR's now.
So I got the BCG staked or replaced today by a person from NEA. But maybe I'm paranoid now, but it looks funny, too.
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That is one sorry ass bolt carrier. The gas key looks like someone took a grinder to it, and it looks like they don't have the staking tool you can get from Brownells.



























