|  Celcius Steel Hopup Adjuster Screw for CTW / Systema PTW and compatible series AEG Rifle Material: Steel Manufacture: Celcius Net Weight: 0.1g Length: 5.02mm Diameter: 2.92mm Item Part#: BRL-021 Compatible: with M4, M4 CQB, M16A2, M16A3 CTW / PTW & compatible training weapons. |