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June 12, 2014, 04:44 PM | #1 |
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AR15 forearm weight - regular vs. float tube
I've been looking all over, but can't seem to find this information spelled out anywhere.
I'm interested in a light weight mid length AR, and have the option to a two piece aluminum float tube for only a few dollars more. What I haven't been able to find is the weight difference between standard hand guards with the delta ring and other hardware vs. a two piece aluminum free float tube. I realize carbon tubes are the lightest, followed by one piece aluminum and very drilled out tubes. But I can't tell if a pretty normal 2 piece is lighter, heavier or the same as a regular hand guards with delta ring. If you have carbine or 20" numbers, that's fine, too. I understand the other benefits or downsides to the different systems - heat, interchangeability, accuracy, accessories, etc. I'm just curious what the different options do to the total rifle weight. Thanks. |
June 12, 2014, 06:15 PM | #2 | |
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Quote:
This is a carbon-fiber upper and lower with a thin profile barrel and started out at 5.6 lbs for the whole rifle. As you can see I have added some weight to it with the quad rail and accessories, but it is still very manageable. Jim As it originally came:
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June 12, 2014, 06:32 PM | #3 |
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Yes, I'm looking at a light weigh barrel. I'd like to know what tubes, handguards, delta rings, etc actually weigh.
I'm not opposed to a slightly heavier tube, since it has other benefits. I just want to know how much the trade off will be. |
June 12, 2014, 08:43 PM | #4 |
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I dont have any uninstalled at the moment that I could weigh. I have built all I have and am waiting on more parts. The weights are very close so long as you use the same length float tube as the hand guard you are replacing.
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June 12, 2014, 08:54 PM | #5 |
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My FF tubes are a few ounces heavier than a standard set of same-length handguards and associated hardware would be.
But... most of them aren't exactly super-thin or aggressively vented. I can tell you that my DPMS vented rifle length FF tube (15 oz) is about 3 ounces heavier than comparable standard handguards. But, my "Todd Jarret" () YHM extended rifle tube adds another 7 ounces. It is almost double the weight of a standard set of rifle length handguards and hardware. (But, 'standard' handguards and hardware vary by manufacturer, as well. So, there's no 'set' weight.)
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June 12, 2014, 10:13 PM | #6 |
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You might be interested in the Midwest Industries Gen 2 drop in rails. They weigh less than the Magpul MOE handguards, or about the same.
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June 13, 2014, 03:05 PM | #7 |
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http://www.vuurwapenblog.com/calc.html
Stock, single heatshield carbine handguards are 8.2oz, of which 2.8oz is the barrel nut, delta ring, etc. The double heatshield M4 handguards are 9.3oz. |
June 13, 2014, 07:00 PM | #8 |
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Based on the numbers in that link...
My DPMS vented rifle length FF tube is 5 ounces heavier. And the Todd Jarret extended rifle FF tube is 2.5 times as heavy (13 ounces heavier). One thing to keep in mind, though: Some companies have been known to only list the weight of the FF tube itself, and don't include the weight of the barrel nut. In some cases, that can make a huge difference. Your typical aluminum FF tube barrel nut weighs about 1.5-1.8 oz; but the typical steel FF tube barrel nut weighs 5-7 oz. When you're worried about weight, that hidden 1/3 lb is significant.
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