Midwest Industries AK Receiver Maintenance Block, Polymer Construction, Red, Compatible with AK47/AK74 Receivers MI-AKLRB AK enthusiasts" rejoice: this one's for you. The first of its kind" the AK Receiver Maintenance Blockfrom Midwest Industries is designed to make building and maintaining your firearm a breeze.This high-strength polymer block enables builders and hobbyists to secure their AK-47 or AK-74for easy maintenance and repair without damaging the finish. It also allows for full disassemblyand reassembly of the bolt if needed. Like all Midwest Industries products" the AK ReceiverMaintenance Block is made in the USA to the most exacting standards.