Working on an xl spreadsheet with all the points we are measuring on the surplus mags. When I get some data together I'll find a way to link the spreadsheet and the drawing with the data points on it so everyone can see what we are doing.
7/19/09 Got the spreadsheet started so will get it and our drawing posted as soon as I can.
Post by Ace of Shades on Feb 24, 2009 19:35:35 GMT -5
couple of issues i see already #1 - you can directly measure L2 & L3, and L1 should be equal to L2 - L3 entries in that table do NOT bear that out (probably because no place to clamp calipers on L1) #2 - there is no W3 labelled on the drawing to measure #3 - unequal numbers cannot be both the min and the max (color coding incorrect T3)
ok, i cant help it... AR means different things to different people
I'm glad somebody is checking my work! Most issues, other than fat fingers, no coffee, and blurred vision, is where to measure consistantly. I'm working on that one, or more importantly, working on not having to measure.
W3 is the opening width of the feed lips on the mag.
As far as the big surprise goes, it wouldn't be a surprise if I told you now would it
Update: New feed ramp version of adapter is in production. Gathering data on mag sizes and more importantly, what causes them NOT to feed, and how to correct it. We will build a jig to size the mags when the next batch of adapters goes out to anodizer.
Hi All, Worked on mag fitting last night and here is the preliminary findings on this batch. These are all mags fresh from Military Gun Supply with no mods.
Mags checked: 22 pcs
Fit and locked: 11 pcs = 50%
Fit but not locked: 3 pcs = 14%
Did not fit: 8 pcs = 36%
The next step is to qualify critical dimensions and see where the no fit mags need to be sized. Once that is done, we can build a jig and have our machine perform the sizing. We already tweak the feed lips so this won't be that much of an issue, just time to get it done. For those of you who ordered mags or slots cut, we will definately check your mags and make sure they function 100% or replace them with ones that do.
Update: 05/07/09 Mag Sizes While this batch of adapters are at the anodizers, we are building jigs to cut magazines and are finding some revealing information, as can be expected. We were sizing mags for a customer and found that the W1 dimension was critical to mag fit. This is the front to back dimension. But while the mags would not fit, the dimensions were smaller than mags that did fit. We then started to check the curvature of the mags, and this indeed, added another variable to the mix. We are looking at the best way to address this. Mag sizing will get the mags to work but we are also testing some mods to the adapters to see if we can open them up a little without causing problems with the loose mags. I'll keep you posted. Tim