The only redeeming feature of the AR180B is that it is non-rest. It is somewhat difficult to find one (a new one) and production of this rifle is on hold, so...
AR10..........do you really want more recoil and spend more cash on ammo?. It's only a range gun, so...it's really up to you if you want to spend the cash on 7.62/308 vs 5.56/.223
At least 33 companies make AR-15's for the U.S. civilian market:
Remington Arms Co Inc, NY
DPMS Inc, MN
Bushmaster Firearms International LLC, ME
Stag Arms LLC, CT
Rock River Arms Inc, IL
Armalite Inc, IL
Kimber Mfg Inc, NY
Colt Defense LLC, CT
Olympic Arms Inc, WA
Vulcan Arms Inc, MN
Smith & Wesson Corp, MA
Aero Precision Inc, WA
Barrett Firearms Mfg Inc, TN
Double Star Corp, KY
D C Industries Inc, MN
Superior Arms, Inc, IA
Lauer, Steven Michael, WI
CMMG Inc, MO
Ameetec Arms Llc, AZ
DS Arms Inc, IL
Sabre Defence Industries Llc, TN
High Standard Manufacturing Co Inc, TX
Cobb Manufacturing Inc, GA
Cavalry Arms Corp, AZ
Wilsons Gun Shop Inc, AR
Lewis Machine & Tool Co, IL
Lawton Machine LLC, MT
Spike's Tactical LLC, FL
McMillan Bros Rifle Co Inc, AZ
Wilson Tactical LLC, AR
SNS Industries Inc, WA
JP Enterprises Inc, MN
LWRC, VA
There are only a couple of Canadian manufacturers that I know of:
ATRS
DLASK
It's like picking chevy over ford over chrysler over x over y over z......except that Colt is sold at Cadillac prices, they all work. I just bought a couple Aero Precision stripped lowers any they look great!