Spear Arms

Complete AR-15 Upper including:

Barrel

• 16" length
• 5.56 NATO Chamber
• Mid-length gas system
• .750" gas block journal
• 1:7 RH twist
• 4150 CMV
• Stress relieved after rifling
• Black Nitride finish by H&M

Handguard

• Premium 15" MLOK Handguard

Upper

• Forged, black anodized

Charging Handle

• Manufactured to milspec dimensions
• Made from 6061-T6 aluminum bar stock
• Hard coat anodized - black

Gas Block

• .750" Low Profile Gas Block - Set Screw
• Machined from 4140 pre-hardened steel
• H&M Black Nitride coated
• Closed end gas tube hole
• Chamfered roll pin hole for easy assembly
• Includes gas tube roll pin

Options:

BCG - Nitride

• 8620 M16 style carrier
  • H&M Black Nitride finish
  • Properly heat treated
  • Final grind before plating
• 9310 5.56/.223 bolt
  • Heat treated
  • Shot peened
  • H&M Black Nitride finish
  • MPI
• 4140 billet gas key
  • H&M Black Nitride Finish
  • Properly seated with Grade 8 fasteners
  • Properly staked to ensure reliability
• 4140 Cam Pin nitride treated for wear resistance
• Billet Machined Extractor
  • Machined from solid 4140 bar stock, heat treated and shot peened
  • Phosphate coated for reliable extraction
  • Extractor insert included
  • O-Ring included
• Firing pin precision machined from 17-4 H-900 Stainless Steel
• 100% USA Made

BCG - Nickel Boron

 Properly built, no corners cut, 100 percent US made. The nickel boron coating is applied by the industry leading plater, UCT, Using their patented "EXO" NiB coating and provides a very slick surface that makes for easier cleaning and increases reliability.  With our lifetime guarantee, you can't go wrong.

• 8620 M16 style carrier
  • UCT EXO Nickel Boron Coating
  • Properly heat treated
  • Final grind before plating
• 9310 5.56/.223/.300AAC bolt
  • Heat treated
  • Shot peened
  • UCT EXO Nickel Boron Coating
  • MPI
• 4140 Billet Gas Key
  • UCT EXO Nickel Boron Coating
  • Properly seated with Grade 8 fasteners
  • Properly staked to ensure reliability
• 4140 Cam Pin
  • Heat Treated
  • Precision Ground
  • UCT EXO Nickel Boron Coating
• Billet Extractor
  • 4140 steel, heat treated and shot peened
  • Phosphate coated for reliable extraction
  • Extractor insert included
  • Viton O-Ring included
• Firing pin precision machined from 17-4 H-900 Stainless Steel
• 100% USA Made

Muzzle Device - pineapple flash hider, muzzle brake, bird cage, or none