EABCO Accuracy Barrels for AR-15 and AR-10 rifles. These are in-stock, off-the-shelf replacement barrels made to the specs of our Accuracy Barrel(R) formula. These are made up in batches so that we'll have barrels in stock when you want to order. However, sometimes they're all spoken for and sold out before a batch is finished. So, if you see what you want and it's in stock, Order Today!