The following text is from the Adcor website.
A New Perspective on the Automatic Rifle: The B.E.A.R.™ combines design innovation and precision manufacturing built upon the tried and true M4/M16 rifle platform.
The Adcor Defense B.E.A.R.™ springs from the M4/M16 rifle platform but offers a completely new twist. Available in many configurations, it offers the operator many significant improvements:
A Revolutionary Gas Piston System (Patent # 065111.00128)
Free-floating barrel and increased accuracy: A gas-driven piston incorporated into the upper half of the forward rail system never touches the barrel.
No carrier tilt: The operating rod is connected to the bolt carrier by hex head bolts reinforced with industrial grade Loctite® 262™ high strength threadlocker. They are then drilled and pinned to prevent loosening under adverse conditions.
The operating rod then rides through a machined boss in the receiver rail system interface keeping the bolt carrier in a linear plane as it operates.
No fouling of chamber and action: Hot gases and carbon particulates are prevented from entering the receiver. Because heat reaching the upper receiver is diminished, lubricant lasts longer and maintenance is simplified.
Easily detached lower rail system: No special tools needed for quick cleaning and easy maintenance.
Wear on critical parts is minimized: The operator can easily adjust the piston’s cyclical rate for a controlled rate of fire.
No need for piston rings: Extremely close machine tolerances of the piston eliminate the need.
Exclusive Port Dust Wiper with Cover
Prevents entry of dust, sand or debris: The spring-loaded dust shield mounted on the bolt carrier allows the bolt carrier’s return to ready position; the port dust wiper moves into the ejection port opening flush with the inside geometry of the upper receiver.
Withstands temperature extremes because of the highly durable, self-lubricating polymer shield.
Ambidextrous Forward Placed Charging Handle: Simplicity is Beautiful.
Simple design allows the operator to keep his or her strong hand on the firearm and use the other hand to clear the rifle.
Ambidextrous handle detaches easily without special tools and returns to locked position once used. It folds forward, recessed, and easily swings back out in a single motion.
Non-reciprocating handle only engages when the operator charges or clears.
Rail System ( 7075-T6 )
Innovative, key locked, highly rigid rail system mounts seamlessly to the upper receiver: Design ensures proper alignment of the rail with a redesigned boss, spline and groove system.
Upper and lower rail guards separate with the push of a button: No special tools necessary.
Fully compatible with optical, image intensification or thermal sights; laser targeting systems; bipods; tactical lights and Multiple Integrated Laser Engagement System (MILES).
About Adcor Defense
Adcor Defense, Inc. is a wholly owned subsidiary of Baltimore, Md.- based Adcor Industries, Inc. For over 20 years, Adcor Industries has served as a national defense contract supplier. In that capacity, it built nine of the very critical components for the Trident missile system, radar system components for the F16 fighter, and other components for the U.S. military small arms industrial base.
With its diverse manufacturing capabilities and expertise as a defense industry supplier, Adcor was in an ideal position to design and build its own unique version of the M4 automatic rifle: Adcor Defense, Inc. was formed for that purpose.
The product of years of hands-on experience and experimentation by inventor, Michael J. Brown, the Adcor Defense B.E.A.R.™ (Brown Enhanced Automatic Rifle) is not a “new and improved” AR: It has a patented (Patent #065111.00128) revolutionary gas piston system and other key features that set it apart from all other M4-type rifles.
All components for the Adcor Defense B.E.A.R™ are manufactured in the U.S.A., and it is built in the Adcor Defense factory in Baltimore, Md.
Why I love that gun, 7reasons this gun ROCKS!
1-Piston Driven
2-Light weight, especially compared to other piston rifles
3-Free floating barrel
4-Forward non-reciprocating ambidextrous charging handle
5-No carrier tilt
6-Made in America
7-Dust cover wiper system
