Description
Dirty Bird 7.5″ Pistol 556 M-LOK Upper AssemblyThis Dirty Bird Industries Complete Upper featuresa Black Nitride 7.5″ Sub-MOA HeavyProfile barrel chambered in 5.56 with a 1:7 twist. Built on a top-tier t-marked Forged Upper Receiver and finished with Dirty Bird’s 9.5″ SMRS M-LOK Handguard available in several color options. No corners are cut when manufacturingthese complete uppers. All barrels are dimpled and cold blued, use a black nitride 4140 steel gas block and a stainless steel gas tube. The gas block set screws feature knurled cone tops and are installed using blue locktite ensuring that no amount of vibrationwill cause the set screws to come loose but they willstill be removablefor servicing if needed.Made in the USA -Backed by Dirty Bird Industries’ Limited LifetimeWarrantyBarrel:Chambered in 5.56 (will also function with .223)7.5″ HeavyProfile w/ 1:7 TwistMid-Length Gas SystemBlack Nitride FinishHigh Pressure Tested, Magnetic Particle Inspected and Test FiredRecessed Flash CanBCGMachined fromCarpenter Technology No. 158 alloy.Heat treatedShot peenedper ASTM B851/SAE AMS2430SIndividually High Pressure Tested (test fired)HP proof testing,100%using a high pressure M197 or SAAMI commercial equivalent, without evidence of failureIndividually Magnetic Particle Inspected after Initial Test FireManganese Phosphate FinishHandguard:ToughMachined from aircraft grade 6061-T6 aluminum extrusions.Anti-rotation tabs.Type 3 hard anodizing or Cerakoteâ„¢ sprayed at 1 mil thickness per spec.VersatileM-LOK attachment slots on all sides (except top)1913 Picatinny top rail withshavedand 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.PracticalNo extraneous cuts in the aluminum simplyfor the sake of weight savings or enhanced visual appearance.Aircraft Grade aluminum barrel nut. In our tests, the aluminum barrel nuts are just as effective when torqued to spec. Additionally, theweight savings enable us to utilize a longer barrel nut design which means more surface area at the attachment point without adding unnecessary weight.Upper Receiver:Precision Machined from Top Tier 7075-T6 Aluminum Forgings (forge marks may vary)M4 Feed RampsNot all forged uppers are created equal and we only use the best for our uppers meaning theywill be free from excessive pitting, machined to spec and finished with quality (not purple orchalky) hard coat anodizingLaser etchedT-marksAvailable Handguard Colors:Black, Magpulâ„¢ FDE, Magpulâ„¢ OD Green, Midnight BronzeAll NFA/ATF Rules ApplyYou may use this AR 15 Upper with a lower receiver that is a Registered SBR, Machine Gun, or Pistol. Possession of this barrel along with a Non-NFA lower receiver is Prohibited, except when installed on a Pistol configuration firearm.
