Re: magazine extenders
I have two of them, one on a .223/300 whisper and a second on my 6x47L. They've held up to hunting treatment. Both guns get carried quite a bit. I wouldn't stake my life on them, but they work quite well for what they are and how much they cost.
My 6x47L runs a little smoother now due to the decreased spring pressure. And I still have enough spring pressure on the last round so that the bolt doesn't override the rim.
I'm happy with them on the two rifles I have them on. Sometimes keeping up with mags is a PITA. Now I have increased round capacity without fussing with detachable box magazines.