FN M249s 5.56Nato 18.5" Belt Blk

Action: Semi Auto - Caliber: 5.56x45 - Operation: Closed-bolt - Barrel Length: 20.5 - Overall Length: 40.75 - Overall Height: 9.5 - Weight: 17.0 lb - Twist Rate: 1:7 RH - Trigger Pull: 4.0 -6.5 lb - RECEIVER - Formed steel frame with claw extractor design - Fixed pivoting ejector plus side ejection of cases - Top cover integrated MIL -STD 1913 mounting rail for sighting systems - BARREL - Changeable barrel - Cold hammer-forged steel - Hard chrome-plated bore and chamber - STOCK - Highly ergonomic polymer buttstock assembly with hydraulic recoil buffer system and non-slip buttplate - OPERATING CONTROLS - Crossbolt safety - Curved trigger for improved finger position and control - FEED SYSTEM - Standard disintegrating link belt-fed - Under-mounted polymer ammunition container helps keep ammunition cleaner for reduced wear and added reliability