20" standard AR-15 A-2 rifle

20" Standard Military rifle Kit
20" AR-15

The standard AR-15 M-16 A-2 and flat top rifle barreled uppers pre and post ban models available. Most shown will be Pre ban config.

This AR-15 barreled upper is headspaced, and ready to mount to your lower receiver after installing the bolt carrier group, see options.  Once you have an assembled lower with the parts installed and mount the upper,  this is an operational firearm 5.56mm.