Ok, you didn't replace the receiver extension, right?
Anyway, the buffers should be the same length, the springs should be close. If there's a big difference maybe you're mixing rifle and carbine buffers/springs.
What was the reason for buying a new spring and buffer along with the Magpul stock? To get an H buffer?
Ringing? Are you chambering a round or just letting the bolt slam against the barrel extension?
The biggest issue with assembling an AR isn't so much getting the parts together right - it's getting the right parts together.
US Army 1966-69, VFW Life Member, Retired Geek
Last edited by Quentin; 06-09-2013 at 08:43 PM.