Similar to F17-L model, but piston-driven function. Barrel: 16” M4 Contour. Sights: Fixed front & MBUS. Lower Receiver: FAI. Handguard/Upper: Magpul MOE SL M-Lok Gray. Stock: Magpul SL. Grip: Magpul K2. Stock: A2. Grip: A2. Weight: 6.7 lbs. SEE POLITICAL PANIC PRICING.