Glockslap Posted January 4, 2012 Report Share Posted January 4, 2012 Lightest Upper & Lower Receiver? I think it was mentioned the SI Defense was the lightest, but how much is there to be saved over the standard DPMS? Quote Link to comment Share on other sites More sharing options...
survivalshop Posted January 4, 2012 Report Share Posted January 4, 2012 I think all (except Armilite) AR 308 lowers are billet & the DPMS uppers are not . My SI defence upper is a little heavier than my DPMS upper that's not billet . The SID does have an extra rail on the left side , that I removed , so that would add weight even with out the rail on there . Its got a block , raised portion of the upper where the rail bolts to & it doesn't have a forward assist like my DPMS has.I don't think there's enough of a difference there to matter on the receivers, upper or lowers. Quote Link to comment Share on other sites More sharing options...
Robocop1051 Posted January 5, 2012 Report Share Posted January 5, 2012 SS, you and Imschur have the SI-D GenII receivers. When i bought my SI-D they told me that the GenIII receiver set was 20% lighter than other similar receivers. I don't have the rail on the side of mine. What do you put on that rail? Quote Link to comment Share on other sites More sharing options...
Glockslap Posted January 6, 2012 Author Report Share Posted January 6, 2012 I really need to know the weight difference on these items. 1 ounce-not worth it. 3-6 oz? Worth it...maybe <dontknow> Quote Link to comment Share on other sites More sharing options...
Robocop1051 Posted January 6, 2012 Report Share Posted January 6, 2012 I really need to know the weight difference on these items. 1 ounce-not worth it. 3-6 oz? Worth it...maybe <dontknow>I heard this a lot when I started my build. People asked me if it was worth all I spent when I bought lightweight parts. My explanation is, if I save only 1oz. at a time, but I save it on 16 different parts... then I am still 1 pound lighter than where i would have been. In the end, all those 1oz parts add up. It also afforded me the ability to buy sturdier parts that may have been 1 or 2 oz heavier than a standard part (like my stainless BCG). Lightweight is nice, but reliability costs lives. Quote Link to comment Share on other sites More sharing options...
survivalshop Posted January 6, 2012 Report Share Posted January 6, 2012 SS, you and Imschur have the SI-D GenII receivers. When i bought my SI-D they told me that the GenIII receiver set was 20% lighter than other similar receivers. I don't have the rail on the side of mine. What do you put on that rail?That's a good question & is why I removed the rail. I 'm sure you can put any thing there you put on a rail on a hand guard , but I would think , your arm would get in the way , some what.Mine doesn't have a forwad assist , I think the Gen III does, so that has to add . 20 % sounds like a lot , but when dealing with ,light , to begin with , not so much.I think , as I said , the upper & lower , would not be the place to lighten things up , there is not much there to scrimp on & would you want to ? The barrel is the big weight in any 308 or other rifle & stock choice is the next . You could go light weight BC , but you have to adj. other things to make them work properly. Like adding weight to the buffer. Quote Link to comment Share on other sites More sharing options...
Jgun Posted January 7, 2012 Report Share Posted January 7, 2012 When I assembled my Kaiser gun, I remember being surprised that I could actually feel the difference in weight between the Kaiser receiver set and the MA TEN set I had on hand at the time. I remember asking Greg (the owner of Kaiser) about it and he claimed that his receiver set was the lightest billit set available at that time. I seem to recall that the difference between the two sets was something like 4-5oz. My opinion (based on no documented testing) is that the thinner walled upper receivers (like the Kaiser) may be able to flex a little more than a heavier walled upper. I'm thinking bench rest bolt action receiver vs hunting rifle receiver, I realize that in an AR the barrel extension actually mates to the bolt, unlike a bolt action, but I think that a heavier walled receiver "may" be capable of being more accurate than a thinner walled, all other things being equal. I just weighed the billit POF rec set that I have on hand at the moment and it weighs 1lb 12oz. using a kitchen scale. Any chance your receiver is still stripped Robocop? If so maybe you could give us a weight? Quote Link to comment Share on other sites More sharing options...
survivalshop Posted January 7, 2012 Report Share Posted January 7, 2012 If its the one he is waiting for a barrel & BCG , it should be stripped , some what . <laughs> Quote Link to comment Share on other sites More sharing options...
Robocop1051 Posted January 7, 2012 Report Share Posted January 7, 2012 Sorry, no can do. The lower is completed and the upper has all the small parts installed. I can say that my SI-D .308 weighed nearly as little as my Mega Arms billet AR-15. Although, the Mega was on the heavier side for a .223/5.56 Quote Link to comment Share on other sites More sharing options...
MaDuce Posted January 8, 2012 Report Share Posted January 8, 2012 I wish I knew you had that before we met Mr. Robobot. Those shell deflector bumpers I made should fit it. I'm shipping out the last of the requests today and I still have 4 or 5 left I think. You're still welcome to one if you like. Quote Link to comment Share on other sites More sharing options...
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