XD45 7,124 Posted April 29, 2014 Report Share Posted April 29, 2014 http://www.ar15news.com/2014/04/22/sneak-peek-battle-arms-development-sub-4-pound-ar-15/ Quote Link to post Share on other sites
Shandlanos 1,470 Posted April 29, 2014 Report Share Posted April 29, 2014 I wonder if that's still an aluminum alloy, or if they went with magnesium. Huge difference in density - and magnesium is a fine structural metal.Alloys notwithstanding, pure aluminum weighs about 2.7 grams per cubic centimeter, magnesium weighs about 1.7. Quote Link to post Share on other sites
Sdustin 578 Posted April 29, 2014 Report Share Posted April 29, 2014 Been done before carbon97 rifle 3.9pounds Quote Link to post Share on other sites
XD45 7,124 Posted April 29, 2014 Author Report Share Posted April 29, 2014 The Carbon 15 Type 97 was 3.99 pounds. If you're going to throw out numbers... Quote Link to post Share on other sites
Sdustin 578 Posted April 29, 2014 Report Share Posted April 29, 2014 Sub 4 pound. I think with a mag upper and lower, a 14.5" super lite barrel with a perm attached flashhider, and carbon free float tube, and ace ultralite stock would put you very close to 4-4.5 without any crazy other parts like the carbon rifles. Quote Link to post Share on other sites
Arik 565 Posted April 29, 2014 Report Share Posted April 29, 2014 Been done before carbon97 rifle 3.9pounds Theres one at my LGS. What a joke. I wouldnt trust that thing to stand up to 22lr 1 Quote Link to post Share on other sites
YOT 3,743 Posted April 29, 2014 Report Share Posted April 29, 2014 Someone thinks that an AR15 is really that heavy to begin with?? Maybe they better go to a gym! 5 Quote Link to post Share on other sites
Spacehog 2,218 Posted April 29, 2014 Report Share Posted April 29, 2014 I like my guns as light as possible because......I need to go to the gym. it seems that the reduction in weight here comes not only from advanced materials, but also by redesigning key parts of the platform which IMO really takes away from the modularity and draw of the platform. I would trade an extra pound or two to preserve that interchangability. Quote Link to post Share on other sites
Matthew Hopkins 1,065 Posted April 29, 2014 Report Share Posted April 29, 2014 once the gear queers, mall ninjas and the wannabes add all that after market crapola on it, it ain't going to be no sub-4 pounds any longer. Quote Link to post Share on other sites
whatmanual 44 Posted April 30, 2014 Report Share Posted April 30, 2014 (edited) Sort of mixed on the really lightweight models. On one hand, it can mean other gear or even more ammo, or just being more nimble. On the other, I sort of like having some mass/weight there for repeat shots. It doesnt have any kick of course, but its just something I wonder about. Then again, lighter weight can be good for quick snapshots too. I suppose in the end doesn't matter to me much. I prefer my Arsenal 74. Edited April 30, 2014 by whatmanual Quote Link to post Share on other sites
mostholycerebus 415 Posted April 30, 2014 Report Share Posted April 30, 2014 (edited) 4lbs with cutouts and odd materials? Big deal. They could have shaved .35oz by going with the Magpul K grip instead of the B5. A red dot with carbon fiber handguard (6oz) is heavier than BUIS on a railed BCM KMR rail (6.3oz), and is useless when battery dies or breaks. Their gas block is way overbuilt. A 1.27oz Parallax adjustable gas block would allow them to run a lightweight buffer and JP lightweight BCG. 300BLK pencil barrels weigh less because the inside hole is bigger, and you can pin a 3.4oz FSC30 to a 13" barrel for even more savings. What trigger are they using? You know what happens when you try to fire a 4lb rifle with a 6lb mil-spec trigger? Amateurs. Thats pathetic considering the time, money and materials they put into it. My SPR is 6lbs. 5-6lb is now considered 'lightweight', under 5b is 'ultralight' and neither are hard to achieve if you are comfortable with the tradeoffs. As far as 'grow stronger' yeah, my 5yo is working on it. Edited April 30, 2014 by mostholycerebus Quote Link to post Share on other sites
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