Dirty Bird 16" Govt Mid 556 M-LOK AR-15 Complete Upper Assembly - OD Green

Dirty Bird 16" Govt Mid 556 M-LOK Upper AssemblyThis Dirty Bird Industries Dirty Bird SMRS Handguard featured our new Rock Solid Patent Pending Anti-Slip / Anti-Lift attachment system. The clamp-on style of handguard attachment, utilized by many manufacturers is both secure and convenient but one problem has always been that clamping the handguard it tends to lift the front end of the handguard. The longer the handguard, the more drastic the effect. If you've ever had to bottom-out the front-sight post of a rail mounted BUIS in order to get the correct elevation, the issue is probably due to this ""lift"" phenomena.BarrelChambered in 5.56 (will also function with .223)16"" Government Profile w/ 1:7 TwistMid-Length Gas SystemBlack Nitride FinishHigh Pressure Tested and Magnetic Particle InspectedSub-MOA GuaranteeBolt Carrier GroupDesigned for use with both 5.56 and .223Strategically relocated load bearing surfaces reduce carrier tilt/can't during recoil, thus increasing reliability and longevityAdditional wall thickness in the gas exhaust port area for added strength and rigidityHigh Pressure Tested and Magnetic Particle InspectedHandguardToughMachined from aircraft grade 6061-T6 aluminum extrusions.Anti-rotation tabs.Type 3 hard anodizing or Cerakote sprayed at 1 mil thickness per spec.VersatileM-LOK attachment slots on all sides (except top)1913 Picatinny top rail with shaved and beveled center section.Raised QD attachment points at the 3 and 9 o'clock positions.Snag free design with smooth, uniform octagonal surface ideal for accessory attachment or application of specialty coatings or patterns.PracticalAircraft Grade aluminum barrel nut. In our tests, the aluminum barrel nuts are just as effective when torqued to spec. Additionally, the weight savings enable us to utilize a longer barrel nut design which means more surface area at the attachment point without adding unnecessary weight.Upper ReceiverPrecision Machined from Top Tier 7075-T6 Aluminum Forgings (forge marks may vary)Not all foged uppers are created equal and we only use the best for our uppers meaning they will be free from excessive pitting, machined to spec and finished with quality (not purple or chalky) hard coat anodizingM4 FeedrampsLaser etched T-marksCharging HandleMil-Spec Style6061-T6 Billet AluminumSmooth Operation and Positive Grip under Extreme ConditionsType 3 Class 2 Hard Coat AnodizingAvailable Handguard Colors: Black, Magpul FDE, Magpul OD Green, Midnight BronzeMade in the USA - Backed by Dirty Bird Industries' Limited Lifetime Warranty