Bravo Company Mil-Spec Carbine Stock Hardware Mounting Kit W/Buffer/Spring/Hardware Aluminum Black. These AR15 Buffer Tubes by Bravo Company MFG make installing your stock quick and easy with a receiver extension receiver end plate lock nut and more. Compatible with stocks from a wide range of manufacturers this Bravo Company BCM M4 Stock Mounting Hardware is a must-have for anyone wanting to install their own stock. Specifications for Bravo Company Mil-Spec Carbine Stock Hardware Mounting Kit: Manufacturer: Bravo Company MFG Color: Black Gun Model: AR-15 Condition: New This kit is compatible with the plastic stocks from; BCM VLTOR LMT Magpul CTR-M Stag Arms Colt Package Contents: Receiver Extension - Mil-Spec 6 position (machined from 7075T6) Receiver End Plate Lock Nut (Castle) M4 Action Spring Carbine Buffer Assembly Carbine Standard What firearm models does the manufacturer say Bravo Company Mil-Spec Carbine Stock Hardware Mounting Kit is compatible with? The manufacturer suggests that Bravo Company Mil-Spec Carbine Stock Hardware Mounting Kit is compatible with AR-15Bravo Company BCM-STOCK-HARDWARE-KIT: Mil-Spec Carbine Stock Hardware Mounting Kit W/Buffer/Spring/Hardware Aluminum Black