The Williamson County Sheriff's Office is accepting bids for 110 Patrol Oriented, Duty Use Short Barreled Rifles, MODEL: SAR-15 or Sionics Patrol SBR 11.5" or equal. The Rifles MUST meet or exceed the following parameters, which are requirements for the needs of the end users of these weapons. Bid must include delivery to 408 Century Court, Franklin, TN 37064. AR15 platform 11.5" chrome-lined barrel-Medium Contour, 41V50, 5R Rifling, NATO Chamber, 1:7 twist rate, Air-Gauged, Radiograph and Magnetic Particle Inspected - RADIOGRAPH INSPECTION ON EVERY BARREL IS A MUST Hand Polished feed ramps No batch test firing, every rifle must be test fired 10.8" MLOK Rail system NP3 Coated bolt carrier group with M16 style carrier • Properly sized/staked mil-spec gas key that is NP3 coated and heat treated 이 Optimized Carrier Key Screws (OCKS) o Hand installed Aviation Permatex Gasket between gas key and carrier 이 이 Carpenter 158 Steel bolt, High Pressure/Magnetic Particle tested and inspected, shotpeened Sprinco 5-coil heavy duty extractor spring and black spring insert o NP3 treatment on bolt AND cam pin Carbine-length direct-impingement gas system Forged 7075 aluminum upper and lower receivers Radian Ambidextrous Charging Handle Magpul MBUS Pro Sights Radian 45-degree ambidextrous safety selector Quick Detach End plate Vltor A5 Buffer System with Sprinco Heavy Duty Spring Magpul MOE-SL Stock Magpul MOE-K2 Grip Magpul Trigger Guard MLOK Rail Covers Agency engraving on lower receiver 7 position receiver extension Enhanced Nickel PTFE coated Trigger Assembly SIONICS WEAPON SYSTEMS MCTR low back pressure suppressor, this suppressor was agency tested and meets our requirements, outperforming other options in both operator safety and price point. Quick Detach Flash Hider for SWS MCTR suppressor Aimpoint Duty RDS Optic ONLY