thinking of doing some dealing on a barrel and have a couple of options, one is a RRA  SS 20" with 1/8 twist, vortex fh, railed gas block, and has 500rds through it. Second is RRA 24" heavy bull with 100rds through it, 1/8, and comes with railed or low pro gas block.  The barrel I'm looking to trade is a CMMG 16" M4 LE barrel with 100rds through it and has with everything but delta ring, this would be an even swap.

Every barrel is different to some extent, but I have a RRA 16" SS 1/8 that shoots like a house afire- very accurate.

Sounds like your getting a pretty good deal if the RRA barrels are as described. I would go with the 20" myself unless your really going for some serious distance and need that little higher velocity the extra 4" will give you ... I've personally never owned one of RRA SS barrels but have heard from several people here they are tack drivers.

thanks guys, I decided not to do the trade. It was a good deal but it would put my 6.8 build on hold for another year and I didn't want to do that.