Complete w/ bolt and carrier.
Free-floated with tube
Each receiver is built to his stringent specs and chambered in .223. Only the best components will be used in the production.
Each upper will have a:
Krieger 1-7.7" twist barrel w/flash suppressor (or can be ordered without)
Bushmaster upper receiver
Chambered using a long-throat reamer designed by Gene himself. This improves the accuracy of the heavier 80 grain bullets without any negative effect on the lighter bullets.