Upper Receiver Block for AR15

This upper receiver block is a perfect fit for AR15 and M4 receivers. It greatly simplifies the assembly process and makes general maintenance of AR receivers a breeze, ensuring smooth operation of your rifle.

Using this upper receiver block is easy. First, make sure your AR15 or M4 receiver is clean and free of debris. Then, carefully place the upper receiver block onto the receiver and align it properly. When it comes to assembly, take your time to ensure all parts fit snugly. As for maintenance, regularly check the block for any signs of wear or damage. Keep it clean by using a soft brush and a mild cleaning solution. Avoid using harsh chemicals as they may damage the block. If you notice any problems, stop using the block immediately and consult a professional.