Reap Weaponries AR-15 Mounting Block Black. Whether youre switching between rifle calibers or moving from a carbine to a pistol setup this mounting block allows you to swap upper receivers quickly using standard detent pins. CNC-machined from aircraft-grade 6061-T6 aluminum and anodized in black the mounting block is built to last and is fully M-LOK and KeyMod compatible for seamless integration with your existing setup. This makes it perfect for shooters who want to adapt their Scy system to different calibers or configurations while maintaining a consistent mil-spec lower. Please note the Scy kit already includes one mounting blockthis is an additional option for those looking to set up multiple upper receivers for rapid transitions in the field. Specifications for Reap Weaponries Mounting Block: Manufacturer: Reap Weaponries Color: Black Finish: Anodized Chassis Material: 6061-T6 Aluminum Features of Reap Weaponries Mounting Block Quick Receiver Changes Swap between uppers with ease using standard detent pins Aircraft-Grade CNC Machining Made from durable 6061-T6 aluminum for a long-lasting high-quality finish Anodized Black Corrosion-resistant and sleek appearance M-LOK and KeyMod Compatible Versatile and ready for a wide range of accessories Perfect for Multiple Calibers Ideal for switching between rifle and pistol calibers with the same lower receiver Additional Accessory The Scy kit includes one mounting block; this is a replacement/extra block for multi-configuration setups Package Contents: Reap Weaponries Mounting Block Reap Weaponries ReapMountingBlock: AR-15 Mounting Block Black