Sylvan Arms SA5 Folding Stock Adapter Features The Sylvan Arms SA5 Folding Stock Adapter is machined from 4140 steel in the USA giving it the strength needed to hold up to repeated folding and daily carry without wearing out. At only 9.4 ounces it adds minimal weight to the rifle while allowing the stock to fold for compact storage or transport. The right hand fold directs the stock toward the ejection port side on a standard build a configuration chosen to match the shooter s preferred setup. An adjustable hinge tension lets the user dial in exactly how much resistance the fold mechanism provides. Compatible with most AR15 standard 1-3/16 inch by 16 thread bolt carrier groups the SA5 requires no additional parts for installation on compatible rifles chambered in .223/5.56 up through .308 and most 9mm AR builds. The kit includes a 1045 steel bolt extension and the installation tools needed to complete the job without hunting down separate hardware. Two QD sling attachment points add mounting flexibility for slings once the adapter is installed. Built with professionals and protectors in mind the SA5 turns a standard AR into a compact concealable platform without compromising reliability. Sylvan Arms SA5 Folding Stock Adapter Specifications Manufacturer: Sylvan Arms Model: SA5 Compatible Hosts: AR-15 .223/5.56 .308 .300 Blackout Most 9mm ARs Color: Black Hand: Right Hand Material: 4140 Steel Includes: 1045 Steel Bolt Extension Installation Tools Weight: 9.4 oz Attachment Points: 2 QD Sling Points Available At: GrabAGun