FAB Defense M4 SKS SB Complete Chassis System w/ Shock Absorbing M4 Tube & Buttstock FDE. These Rifle Stocks from FAB Defense are constructed from fiberglass reinforced polymer for a durable yet lightweight structure. This FAB Defense M4 SKS SB Complete Chassis System w/ Shock Absorbing M4 Tube & Folding Buttstock features 5 QD sling swivel sockets so that you can attach a sling and the built-in enhanced mag release lever speeds up your reloads to keep you focused on your target. Use this FAB Defense M4 SKS SB Complete Chassis System w/ Shock Absorbing M4 Tube & Buttstock to create a better more reliable firearm. Specifications for FAB Defense M4 SKS SB Complete Chassis System w/ Shock Absorbing M4 Tube & Buttstock: Manufacturer: FAB Defense Gun Model: SKS Length: 848 mm Weight: 1360 g Features of FAB Defense M4 SKS SB Complete Chassis System w/ Shock Absorbing M4 Tube & Buttstock Quad Picatinny rail system- Upper Lower & two removable side rails Folding buttstock - Push-button side folding mechanism and spring based locking in folded position Five QD sling swivel sockets Large ergonomic pistol grip Integrated enhanced magazine release lever Three buttstock options M4 collapsible Shock Absorbing or UAS Durable and lightweight fiberglass reinforced polymer construction Package Contents: FAB Defense M4 SKS SB Complete Chassis System w/ Shock Absorbing M4 Tube & Buttstock What firearm models does the manufacturer say FAB Defense M4 SKS SB Complete Chassis System w/ Shock Absorbing M4 Tube & Buttstock is compatible with? The manufacturer suggests that FAB Defense M4 SKS SB Complete Chassis System w/ Shock Absorbing M4 Tube & Buttstock is compatible with SKSFAB Defense FX-M4SKSSBT: M4 SKS SB Complete Chassis System w/ Shock Absorbing M4 Tube & Buttstock FDE