rain556

Thanks alot

Im building my first 308. I bought a psa lower stripped and pws ebt tube and noticed that they make a 308 version. I was told I could use the tube I have. All I have to do is use a 308 carbine buffer and 308 spring. Is this right or do I need the longer 308 version. I purchased a PWS MK220 complete upper. What type of buffer should be .used and will it fully cycle with tube I already have..The tube I have is 7.8 inches and the 308 tube is 8.25 inches