Changing from carbine to midlength question.

[das]

I switched out my Stag upper for a BCM midlength. Do I need to change the buffer or the spring or both? Thank you.

[Zane1844]

No.

I still suggest an H buffer, however. I have ran both flawlessly. The H buffer feels smoother, thought its probably just me thinking that.

[das]

I have an H buffer on the way. How about the buffer spring?

[JSantoro]

You got the same answers when you asked the same question in the first thread about this you posted: https://www.m4carbine.net/showthread.php?t=128946