Good product - Aero Precision M5 .308 Buffer

This spring works I put this on new ar10 dpms 308 built carbine with 7 1/4" buffer tube,to work properly u need the 2 1/2" buffer, i fired over 200 rounds with no problem so works i seen another people with ar10 say they have problems if u don't put the right package together yes u going have hard time i had different springs and didn't work this one works its about 9 1/2 long, i wrote this because when I built my first ar10 I had hard time with and when was buying stuff I didn't know for sure what works.