A bracket to secure the M4 upper receiver to the M4 lower receiver. This is a great fix it part for those that has broken off the M4 upper receiver. It can also be used on a perfectly fine upper receiver to reinforce the tabs that hasn't been broken off.
Fit and compatibility may vary when installing custom parts. Some modification may be required. Professional installation recommended.
Airsoft equipment used for illustration of this mock charging handle are not included.