Well despite being a vocal complainer about polymer mags (specifically the nigthmares I have of the CF issue Thermold C7/8 mags) However I have been running a Glock for a while - and our Sig552's have polymer mags so - obviously it is possible to build a good one.
A lot of fuss has been made of the Magpul PMag (which I can only guess stands for polymer mag).
So I looked around to find some online and had them shipped out (I'm still in Iraq).
So they arrive and looked good -- I quickly stocked them up with Mk262 Mod1. They seem to function fine - however I have had some durablity doubt about polymer in a M16FOW mag -- so with that in mind and inspired by the Magpul test videos -- I decided to run one over with the B6 Suburban -- to get the idea of weight - its a 2500 series Burb with a factory B6 Armor package - a 3 ton jack will not lift the damn thing to do a tire change - you need at least a 5 ton or the thing wont budge.
Secondly most testing had been done of EMPTY mags -- (I have my guesses as to why) but an empty mag reliability test really does not do much for me -- since I am concernd about the mag when its loaded - empty its no good to me.
so 28rds of Mk262 Mod1 in a PMag--meets Suburban.
Standby
and it survives -- no rounds even get popped out.
Not satisfied - I get the driver to reverse back over the mag
crunch heard -- well so much for the PMAG
or not
one round ejected - not exactly the 30rd "burst" I expected.
The mag's spine has been cracked -- but it does not appear to be a catostrophic failure -- thus I decided -- well will it work?
Well it shoots...
As you can see minor case deformation occured on the rounds in the mag while it was run over.
and the mag ran during several drills -- ejected easily - and never caused a hickup -- reloaded and used 4 times after it cracked...
. Stay safe 
Originally Posted by GYates
-- but thanks.
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