A.R.M.S. Military Mounts - Super Extended OSR Swan® Sleeve.
A.R.M.S. Inc. Military Mounts The Dovetail Rail dimension standard for nearly 20 years. A.R.M.S., Inc. specializes in advancing the capabilities of small arms weapons in function, reliability and accuracy. #36 S-Ex - A.R.M.S. Military Mounts - Super Extended OSR Swan® Sleeve. Designed for those who want optimum optic accuracy without the need of combat built-in iron sights, but need the other capabilities as found on the #38 S-Ex/Ex Military SWAN® Sleeve. Raise and lengthen your flat top receiver while totally protecting the rifle dovetails. Minimum order is $100.00. Orders below $100.00 will incur a $10.00 small order fee in addition to any shipping and handling charges.