That thread on "AR configuration you'd bet your life on" has me thinking.  If you had to use a tele-stock, which do you think is the strongest/most reliable currently available?

I beat the poly M-4 slider to hell and back, no signs of wear! More important, I think is the tube, the slider rides on, I'v seen some that are real flimsey and thin!

i prefer a Colt tele-stock. it has a metal buffer tube, thus stronger overall, but then again, perhaps the poly version has more flex, therefore better resilliency - i don't know, i just prefer metal over plastic. also, freezing my cheek to the metal tube in winter doesn't concern me as i prefer the 3rd hole out instead of fully extended to the fourth, so my cheek-weld is on the plastic stock, not the metal tube.

My second choice is colt metal, but the poly slider has a high quality heavy, CNC machined metal tube, with 4 holes! This poly slider gives more reach, and can sit higher on your shoulder, than the colt, great for CQB when shouldered. Another goodie with the poly is that there is no noise to contend with as in the all metal design, while the noise in the metal version can be reduced or eliminated but can be a pain in the ass at times, when ti starts to make noise, this is a consideration to some of you!

The Colt, any of them.

Proper concentricity and depth, timing lip, milled receiver plate, aluminum buffer, drain hole, milspec hard coat anodizing, no rattle, compression molded plastic instead of low temp injection molded drek, reinforcements and rounded edges on the stock, a latch pin that is replaceable, adjustable and removeable, staking notches and wrench notches (not an easily stripped hole) on the lock ring and threads turned off behind the section that gets used.

Extra work=extra $.