Sig Sauer PM400 Tread COIL 5.56mm AR Pistol with ROMEO5 Red Dot for sale. The TREAD COIL sets a new standard in performance and value in the AR category. With installed accessories including ROMEO5 Red Dot Sight, Flat Blade Enhanced Trigger, and 13” lightweight handguard, the COIL is the perfect rifle package for the avid user or first-time buyer. Other features of the TREAD COIL include the precision 16” stainless barrel, ambidextrous controls, and 6-position Magpul SL Stock.

Firearm Features

• M-LOK handguard with lightening cuts to reduce weight, available in 13” and 15” lengths;
• 3 chamber compensator;
• Ambidextrous charging handle made of aircraft grade aluminum and a dual roll pin design;
• ROMEO5 optic featuring a 2MOA dot with ten illumination settings, MOTAC, and 50k battery life;
• Flip-up front and rear iron sights that are easy to install, adjustable, and deploy quickly;
• M-LOK front sight adapter with co-witness height made of lightweight aluminum;
• Multiple configurations of M-LOK grip kits made of high strength polymer;
• Factory upgraded flat blade enhanced trigger