The CAAR-B ISR Carbine chambered in 5.56. Built around a 10.5” barrel from Accurate & Reliable Rifles and utilizing a standard pistol-length gas system, this versatile, high-performance rifle is the complete package, accurately delivering both subsonic and supersonic projectiles downrange with unrelenting reliability. Because the suppressor is an integral part of the barrel, this weapon system is ready for service right out of the box. There’s no attaching a suppressor and wondering if it’s mounted correctly and/or properly aligned. There’s no re-zeroing for suppressed vs. unsuppressed fire. With a Serialized monocore this firearm is a unique purchase. At the time of purchase we will deliver your rifle with a thread protector while the form 4 process for the suppressor takes place. Once your tax stamp is recieved the suppressor core is transferred to you and easily threads into the end of the barrel.