Midwest Industries AR Lower Receiver Block for 223 & 556 - MILRB

Midwest Industries is known for bringing the highest quality manufacturing processes and accessories to the firearms community. With their long history, they are pleased to bring their tricks and knowhow of building quality firearms to the end user's workbench with their high strength polymer Mag Block. Utilizing either the .223 Remington/5.56 NATO or the .308 Winchester/7.62 NATO AR receiver sets, this new mag block makes some of the most tedious tasks in building an AR-style firearm fast and s