how can i put it on my carbon express arrows from walmart the hole on the inside of the arrow is to big!!!!

Buy the correct size nocks next time.

bigger nock or smaller diameter arrow

i didnt know they were gunna need to be a certain size. and what is your question ben? or is it a statement

Sorry, it was a statement.
You may need to purchase a smaller diameter arrow and not really sure if the nock you have comes in different sizes, I have some and they fit my Gold Tip 55/75 arrows pretty good.

Ive heard of this before. I think they only make one size for carbon arrows and one for alluminum. You might have to swith arrows. Are the ones your shooting now junior arrows?

no they are adult ones thery are like 31 plus inches much bigger than my aluminum

I shoot carbon express 340's(CX340's) They fit perfect in them.

What about in axis st 400s? Would they fit? and do they fly differnt because they are heavier?

Can anybody give me an answer? Please