Wilson Combat is releasing BILLet-AR. As name suggests, it is made of billet upper, lower.
According to Wilson Combat, "receiver was engineered from the ground up to address structural design weaknesses in standard USGI receivers and enhance overall tolerances." and
"upper receiver has a precise bolt raceway for smoother chambering, more rigid receiver walls to reduce firing flex, an oversize magazine well for quick reloads and an integrated trigger guard for gloved use and added lower receiver strength."
Price:
Billet Upper / Lower Receiver Upgrade, Complete Rifle - $400.00
Billet Upper Receiver Upgrade, Complete Upper - $200.00
Young Mfg. Bolt Carrier Group Upgrade, NP3 Coated - $50.00
From: Wilson Combat