This is a like new ARMS Swan sleeve #38 S-EX for a 5.56 in a flat top configuration. These are some of the best of the breed. I'm changing the sighting system on my AR and am selling this as it no longer fits my needs. Here is a pic of it on my carbine. It is the phosphate finished "grey" rail under the 552 and over the receiver. As stated in the header, the price is $115.00 shipped in the US. Thanks for looking. PM or post any questions....

