Guntec USA AR-15 Micro AR Pistol System Anodized Black. 4in Buffer that weighs 1.8 oz One Point Sling End Plate with QD Swivel Extreme Duty Castle Nut Specifications for Guntec USA AR-15 Micro AR Pistol System: Manufacturer: Guntec USA Fabric/Material: T6 Aluminum Gun Make: AR Platform Gun Model: AR-15 Length: 5.75 in Condition: New Size: 1.25 in Features of Guntec USA AR-15 Micro AR Pistol System Complete Micro Pistol System Micro Flat Spring One Point Sling End Plate with QD Swivel Extreme Duty Castle Nut Package Contents: Guntec USA AR-15 Micro AR Pistol System What firearm models does the manufacturer say Guntec USA AR-15 Micro AR Pistol System is compatible with? The manufacturer says that Guntec USA AR-15 Micro AR Pistol System is compatible with AR-15Guntec USA GT-MAPS: AR-15 Micro AR Pistol System Anodized Black