Originally Posted by Gatoragn
My Brownells AR15 critical tool pack included one of these:
M16 Pivot Pin Detent Depressor
Click Here to view 'Inst-275 Pivot Pin Depressor.pdf'.
BROWNELLS - AR-15/M16 CRITICAL TOOLS KIT
Made in the U.S.A.
100% Satisfaction. Lifetime Returns.
This tool is the best way I've seen to get the old pins out. You could grind your own, or order one at the same time you order replacement pins. You can get the rear/takedown pin out by removing the butt plate and/or stock, but this may not be very practical, especially with a carbine and a staked nut.
If the pins are tight, the extended pins can be a good solution. Some folks don't have the fingernail power to comfortably remove the pins.
An extended takedown pin could interfere with the operation of an ambidextrous safety, so if you're a lefty or practising weak hand operation take this into consideration.
Lots of opinions and different experiences to sort through, but in the end your opinion is the one that matters the most to you.
Good luck, have fun, and don't force anything!