There are a few manufactuers.
In the end, IMO, it comes down to roll mark and what you are willing to pay for the rollmark. Personally, Im a fan of any CMT made product.
Cavalry Arms
* Cavalry Arms
Continental Machine Tool
* Stag
* Rock River Arms
* High Standard
* Noveske
* Century (New)
* Global Tactical
* CLE
* S&W
* MGI
* Wilson Tactical
* Grenadier Precision
* Colt
Essential Arms
* Essential Arms
JVP
* Double Star
* LRB
LAR Manufacturing
* Anvil Arms
* LAR
* Bushmaster
* Ameetec
* DPMS
* CMMG
* Double Star
* Fulton Armory
* Gunsmoke Enterprises
* Spike's Tactical
Lewis Machine & Tool
* LMT
* Lauer
* DS Arms
* PWA
* Eagle
* Armalite
* Knights Armament
* Barrett
Mega Machine Shop
* Mega
* GSE
* Dalphon
* Gunsmoke Enterprises
* POF
* Alexander Arms
Olympic
* Olympic
* SGW
* Tromix
* Palmetto
* Dalphon
* Frankford
* Century (Old)
Sabre Defense
* Sabre Defense
Sun Devil
* Sun Devil forged billet receivers
Superior
* Superior Arms
In the end, IMO, it comes down to roll mark and what you are willing to pay for the rollmark. Personally, Im a fan of any CMT made product.