CELIK ARMS CHIMERA PB223 SEMI-AUTO .223 REM 18.5" BARRELThe Celik Chimera PB 223 is a lightweight (6. 3 lb), modular . 223 Rem semi automatic rifle built for hunters and sport shooters who want accuracy, low recoil, and easy customization. It features an 18. 5 4140 steel barrel with a fast 1: 8 twist, 1 228 threads and a pre installed muzzle brake, a 7075 T6 aluminium receiver with a Picatinny rail for optics, and ships with two 5 10 rd AR style magazines plus a cleaning kit. An optional pistol grip stock