Real Deal Airsoft 6.01 Brass Barrel (DISCONTINUED)The Real Deal Airsoft Brass 6. 01 Tight Bore Inner Barrel Accuracy and consistency are the main focus on these barrels. Out the box these barrels have are impressively smooth and polished surface internally. The internal condition of your inner barrel plays a massive role on accuracy. If you want to take your accuracy to the next level you can go ahead and polish the inner barrel even more in a matter of a few minutes. The material brass, can easily