Maple Ridge Armoury 15” Receiver Set Precision Machined Billet 7075-T6 Aluminum Type III, Class II, Hard Anodized - Black Interior to US-MILSPEC M4 Feed Ramps .250" Takedown Pin Bores Weight: 7.2oz Stripped Slab Side - No Forward Assist Includes Dust Cover Assembly Precision Machined 6061 T6 Aluminum Type III Class II Hard Anodize - Black Oversized Lightweight Barrel Nut Hodddn Anti-Rotation Pin 4 Anti-Rotation QD Sling Mounts M-LOK at 3, 6 and 9 o'clock positions 1913 Picatinny at 12 o'clock position Weight: 6.6oz Dimensions: L9" x H2.3" x W1.5" Includes tools for installation