Advantages to having a .750 gas port vs . 625 on a mid-weight barrel

[AndyLate]

I think you're agreeing with me it's odd. Care to expand why it's more appropriate? Is it because the barrel has more weight where you don't want it? This could very well explain the slight discount.

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Not all that long ago, there was a wider selection of .750 gas blocks and most pencil barrels had a .750 journal. The ADM barrel profile is simply a holdover from that time. It's not a bad thing, it just offers no advantage and weighs slightly more than a .625.

[judgecrater]

Good for you building your own. You will do fine. Nothing to be learned buying a complete rifle. I have built several and have enjoyed every one.

[Sry0fcr]

I don't really agree asking why a lightweight contour barrel has a larger than typical diameter at the gas block disqualifies me from being capable of choosing components for or assembling a rifle. I've completely disassembled and reassembled (and I'm not talking field stripping) numerous pistols, a PCC (MPX), a shotgun, and built a bolt gun. Despite my experience with other platforms there are so many great suppliers, videos, and forums out there the population of folks that should buy, rather than build, their first AR15 is a very small one.

I started this journey thinking I'd get a Daniel Defense, which I agree would be safer but it's far more fun to roll my own and a heck of a lot cheaper.

Your question didn't leave me with the impression that your knowledge of firearms or the platform was all that high. My impression may well be wrong, but my recommendation stands. My take is that unless you have some kind of frame of reference to know what you want or need, you're probably better served with a factory gun and you'll have more money for ammo and training to gather that frame of reference.

Shheeeiiiit, there was a time that I thought that I wanted to put a RIS II on my 6720. Sometimes you don't know what you don't know.

Plus the additional cost of the tools needed to do it right.

I wish you well on this undertaking, but its definitely not a heck of a lot cheaper if you use quality components.

Plus this.

[titsonritz]

I started this journey thinking I'd get a Daniel Defense, which I agree would be safer but it's far more fun to roll my own and a heck of a lot cheaper.

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Well, you have obviously never "rolled your own" before because it never works out that way, unless you're talking about getting a PSA kit, in which case, carry on.

[grizzman]

I've assembled numerous ARs, but during the last few years, I'm finding many options for factory uppers and lowers that make assembling them myself illogical.

One example is the LE6920 lower and 6960-CCU from Brownells. The complete Carbine will be $865 (less irons) with a Colt BCG from Arms Unlimited.


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[TommyTwoTone]

Well, you have obviously never "rolled your own" before because it never works out that way, unless you're talking about getting a PSA kit, in which case, carry on.

Puchasing a completed rifle from a LGS adds significant sales tax and I'd have to incur additional expenses to convert it to comply with state laws (I don't live in a free state) given how I plan to use it.

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[titsonritz]

Puchasing a completed rifle from a LGS adds significant sales tax and I'd have to incur additional expenses to convert it to comply with state laws (I don't live in a free state) given how I plan to use it.

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Here' your answer to that dilemma.
http://sionicsweaponsystems.com/stor...ifle-zero.html
Buy a complete upper, lower furniture and controls of preference.

[wanderson]

My pencil barrel sports a .625 gas block. Just makes sense to keep a consistent profile and save the weight, unless you just have a specific .750 block you want to run. When I bought my pre-assembled BCM upper they were one of the few options running a .625 block. As previously mentioned above, back in the old days .625 blocks weren’t common so that pencil profile with more meat under the gas block was pretty common, but not today.

[TommyTwoTone]

Thanks for the replies.

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