Re: Plum Crazy Lowers?
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: dtask</div><div class="ubbcode-body"><div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: bpipe95</div><div class="ubbcode-body">I have been collecting pictures and Documenting the stories of each failure in an attempt to show people who may not know what they are getting into.</div></div>
Do you have any hands on experience with the lowers beyond twisting on one to try to get it to flex ?
How would a 50 BMG upper not place immense stress on the area of the takedown pins when fired?
How would firing a 50 BMG upper on a composite 5.56 standard lower equal less stress on the composite lower than the stress of normal bolt/buffer operation when a .223/5.56 round is fired? If you keep in mind what the mechanical process is which occurs repeatedly in the course of normal firing operation and look at your pictures, it stands to reason that any damage caused would likely be an issue of the either the buffer/ buffer spring assembly (not very likely) -or- (more likely) user damage that has been exaggerated for effect and not damage due to a composite mold's inherent weakness.
What is the end game of collecting pics of supposed failures and posting several pictures without any first hand documentation of how & why the failure occurred? </div></div>
The 50 is going to displace the force across the entire receiver. The bolt slamming to the rear exerts force on one specific place of the receiver (the point of failure seen above).
I started collecting the information when I was brought a plastic lower that would not ignite primers and asked to fix it. This made me start doing research on them and finding that it was a common problem with the plastic FCG. I declined working on the lower as I found larger problems in my research and am not going risk the liability of doing work on something that will fail as these have shown to fail. Each picture is documented with the original users story, that is good enough for me.
The end game is to make people aware that these plastic lowers are an inferior product and if they plan to use the rifle for more than a plinker they should be avoided.
At the end of the day I have no horse in the race, I just fix broken shit that is brought to me by shooters. I try to give advice where I can and prevent people from wasting money.
