thegunnerd Posted February 22, 2013 Share Posted February 22, 2013 I just came across these lowers. All poly. I may be late to the party, but they seem like they're fairly well made. A little bit of flashing that needs to be smoothed out , but i can't think of a way to reduce an overall build by about a pound ( as they quote , compared to a standard A2 aluminum lower ) What would you use on your top end ? I would think a lightweight upper of some sort , 14.5" pencil barrel with pinned and welded muzzle brake .JP low mass bolt carrier group, Maybe a burris or trijicon micro red dot, and if you must magpul mbus sights. I wonder what the final weight would be . Anyone try this out ? http://www.gwacsarmory.com Link to comment Share on other sites More sharing options...
usmc0326 Posted February 22, 2013 Share Posted February 22, 2013 Depends on what you were trying to use this for. Home defense or race gun? I have a super light weight 14.5 barrel, but if you send to many rounds down range the POI shifts from cold bore to 40-60 rounds. Vs Medium-recce profiles don't shift hardly at all. Also for a non race gun I would use a Young MFG lightened bolt carrier with the forward assist. Link to comment Share on other sites More sharing options...
latech15 Posted February 22, 2013 Share Posted February 22, 2013 This has been covered at length. I'm pretty sure that the general agreement was that it isn't anywhere near a pound lighter than an aluminum lower. I have a polymer lower. I have maybe 250 rounds through it. It is fine. Use the captured hammer and trigger pins. Everything will be fine. Link to comment Share on other sites More sharing options...
thegunnerd Posted February 22, 2013 Author Share Posted February 22, 2013 (edited) I doubt i'd use it as a competition gun. Probably for carbine class or home defense. I just came across the lowers and have always wanted to see how light i could make an AR that was still shootable and at least moderately accurate . I don't need .5 moa . More then likely this would be a 100 yards and in gun. A for the heck of it build. The complete lower is only 300 bucks. Maybe do some interesting stippling on the grip. Edited February 22, 2013 by thegunnerd Link to comment Share on other sites More sharing options...
MarkCO Posted February 22, 2013 Share Posted February 22, 2013 These are made by the company that bought the Cavalry Arms equipment. They are good and I've built a few lately for folks who got caught without. I prefer a mid gas 16" barrel and a standard weight bcg. The lightest I got was 4.3 pounds with a fastfire. Most are around 5 pounds. Link to comment Share on other sites More sharing options...
thegunnerd Posted February 22, 2013 Author Share Posted February 22, 2013 Thanks Mark. Are you the Mark who runs Carbon Arms? If so, thanks so much for the swap out for me of the FSL 8. I'm fascinated by using their lower and actually one of your ( if it is you ) carbon fiber handguards. Link to comment Share on other sites More sharing options...
MarkCO Posted February 22, 2013 Share Posted February 22, 2013 Yep, that is me. Link to comment Share on other sites More sharing options...
thegunnerd Posted February 23, 2013 Author Share Posted February 23, 2013 Hi Mark, good to see ya Link to comment Share on other sites More sharing options...
gixxerjunky Posted February 23, 2013 Share Posted February 23, 2013 I wouldn't run a polymer lower on any of my guns. I just built a 14.5 pencil barrel with a Geissele MK1 and its under 7 lbs. it's a very fast rifle. Link to comment Share on other sites More sharing options...
Lead-Head Posted February 23, 2013 Share Posted February 23, 2013 Built 16" with an voodoo ultra lite evo barrel this winter. Under 7 lbs, with aimpoint micro. Standard GI Lower. Not my idea of a great match rifle, but pretty cool. It is for my 11 yr old son. Link to comment Share on other sites More sharing options...
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