Buffer and tube are great not spring . 9 1/2" - Kaw Valley Precision PCC 6 Position Mil-Spec Kit

The buffer is great and the buffer tube is carbine length. The buffer spring is extremely short at 9 1/2" this is a huge problem for this set up if you are running an FRT possible out of battery. I already had a carbine length spring every thing else worked perfect and this is still priced very well . Every thing is great quality as expected from Kaw Valley Precision. Using the short spring caused failure to eject and jam.