The Midwest Industries Alpha Series Top Cover brings the AK platform into the 21st century. Machined from 6061 aluminum and given a durable hard coat anodized finish. Patented components allow for an accurate return to zero solution for existing AK firearms. There are no permanent modifications needed for installation on AK Alpha series handguard or firearm allowing user to put firearm back to stock form if desired.Features : Patented Components Allow for An Accurate Return to Zero Solution for Existing AK Firearms Features Adjustable Locking Block to Fit on Most AK Firearms Midwest Industries Recoil Spring Button Made Specifically for Alpha Top Cover Extremely Rigid Lockup Ensuring Dust and Dirt Does Not Enter Firearm Utilizes Two Aluminum and Two Steel Stability Struts for a Solid Lock Up