Did somebody say group buy.........
Mega side charge upper
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warthog,
it seems like for the Grendel it would be very beneficial to have the M4 ramps in the upper. I've heard this brought up before concerning Mega's, but I believe they make them both ways.Last edited by Keep The Change; 11-26-2013, 09:10 PM.
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Originally posted by Keep The Change View PostGroup Buy Group Buy Group Buy!!
I think Ridgerider just needs to send me a left side charge upper so I can take a good look at and do some stress analysis on it. By "stress analysis" I mean break in my barrel and sight it in. Haha!
Not to knock the engineer thing but I get all these new employees with 4.0 GPA out of these ivy league schools with Mechanical and Structural Engineering Master Degrees and and have no common sense. Book smart but no life attributions to reality. It's raining, come out of the rain or you'll get wet. Degree over common sense? I'll take common sense all life long.....
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There was a topic on this on ar15.com someone had pictures of the barrel extension with and without feed ramps. There conclusion, Barrel extension with feed ramps and upper without is okay, but not the other way around, then barrel extension without/ upper without and extension with ramps, upper with ramps. If this makes sense.
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Originally posted by Keep The Change View PostRidgerider,
My only concern with the large amount of material removed on a left hand side charger is that you remove a lot of "meat" where load is typically transferred through........... Also with the beefier front end of the upper, it should have to transfer less load to the back than a forged, mil-spec upper.
I just brought it up because it is a lot of removed material and that just catches my eye as an engineer. Keep up the good work. .
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Beating a dead horse here RR. Also good ol carpentry analogy too, I liked the egg trick but that worked too.
Wonder how light weight car parts these days are made lighter and stronger and fast but seem to be safer too these days compared to the old 1970 lead sleds..
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Originally posted by Tedward View PostHe will send you one, $475 I think... I think your stress analysis is not needed. I really wonder how a "Engineer Degree" has anything to do with the strength of the upper receiver and barrel weight. .
It's a mere conversation and discussion not a pissing contest. Relax a little.
The load from the bolt is nothing, my concern was barrel whip after seeing some slo mo shots of barrel whip in an AR. The whipping action is transferred into the receiver and it has to be absorbed at the front of the upper and that load is transferred back through the upper. Sort of like an I-beam the whipping action is coupled out across the top and bottom portion of the upper receiver. My point initially was to discuss the effects of the missing marterial in the left charge upper.
I will contend that QA's/Ridgeriders upper is very stout at the front and even all the way back. It looks very substantial around the cutouts as well once I took time to look at some up close shots of the upper.
Any concern I had has been put at ease after getting a closer look. I was just wanting to discuss a little bit about a concern I had. Didn't mean for this to diverge into something else.
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Originally posted by Ridgerider View PostOk I take your point now dont know your back ground but I know mine and like most people who think if you remove material then it has to be weaker and that would be a wrong assumption. I have held mil spec uppers in my hands and have witnessed flexing with hand pressure applied to the upper cant do that with mine. Now take a fabricated I beam made from wood, it is stronger, lighter, can bridge further than the same equivalent beam from solid wood. Oh and bye the way the Scar, the Tavor, have openings both sides they just choose to place covers over them and they are thinner material than mine
I also like the way you didn't mill the old charging handle location and just put an insert in there like I've seen before. Very nice looking receiver, wish I could get one right now.
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Originally posted by Tedward View PostBeating a dead horse here RR. Also good ol carpentry analogy too, I liked the egg trick but that worked too.
Wonder how light weight car parts these days are made lighter and stronger and fast but seem to be safer too these days compared to the old 1970 lead sleds..
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