So the first part of the AR-15 grip and stock combined part has printed successfully. An initial prototype revealed some design flaws made by my altering the geometry of the grip itself by angling it back 15 degrees from normal.
Way too thick to wrap my hand around. and that thumbhole is just too small. In the corner you can see an aborted print. It had some missed Y steps and the hot-end jammed. I tend to set-it-and-forget-it with my printer, so when a hot-end jams, i’m pretty much not there to catch and fix it in time to save the print. I get my filament at less than $10 a pound, so i’m not overly worried about the wasted parts(that’s about half what most places charge for it) and on small parts the cost is fairly negligible. I think this whole part was under $3, and it’s one of the biggest ones i’ve ever made. It is absolutely the first to be 100 mm tall. I wasn’t sure my X carriage would clear the frame, but it did(barely!)
Here is the updated part on the bed.
and here it is next to the two-part lower. I haven’t cleaned the support from the main body of the lower, nor installed the parts kit.
And here is all of it next to the previous attempt at printing an AR-15 lower. You can’t see it in this picture, but that is the broken lower which I mentioned in a previous post.
I have FI this weekend(which i still haven’t prepared for) so don’t expect too much progress on this too soon. Clearing the support material from the AR lower is a delicate task, and I’d like to do some acetone brushing to clean up the sides, as I’m fairly certain this one is a keeper.