TREK II 5.56MM 1/2-28 SILENCER 12110 | DIRECT THREAD SILENCER Manufacturer Model Number: 12110 Manufacturer: Gemtech Model: Trek Caliber: 223 Rem | 5.56 NATO Type: NFA - Silencer Item Type: NFA Finish: Black Cerakote Overall Length: 5.7" Weight: 16 oz. Shipping Weight: 1.0 Feature: Full Auto Rated Feature: Pre-Drilled Hole For Pinning Optic Adjustable Objective: false Optic Reticle Illuminated: false