by Guy J. Sagi posted on January 11, 2012 Guns Support NRA Shooting Illustrated DONATE The Adcor B.E.A.R. is a piston-driven AR with a host of unique features. In this article ADCOR, AR-15, piston Related Stories LWRCI IC-A5 Carbine Video Watch: Caracal USA 814 & 816 Rifles Rifle Roundup: PWS MK114 MOD 2-M Rock River Arms LAR-PDS Gallery CMMG and Faxon Piston AR Review Most Popular Review: Staccato C Pistol First Look: Ruger RXM Pistol What's the Best 38 Special Ammo for Self-Defense? Best Distance to Zero a Pistol-Mounted Red Dot The Ultimate Home Defense Shotgun .300 BLK vs. .300 HAMR: Which is the Better Cartridge?