Pistol Build Kit - 9MM | 4.5" Complete Upper Receiver w/A2| AA Stabilizer Fin | TS LPK

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MSRP: $499.90
Sale Price: Sale Price: $299.95
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Pistol Build Kit - Builder's Grade Complete 4.5" 9MM Upper Receiver | A2 | 4" M-LOK | BCG & CH | Always Armed Black Pistol Stabilizer - Fin | Tactical Sport Lower Parts Kit

Complete 4.5" 9MM Pistol Upper Receiver | A2 Flash Hider | 4" M-LOK | BCG & CH:

This Complete 4.5 inch M-LOK upper receiver comes with our Builder's Grade 4 inch free float handguard and is built with only the best Mil-Spec components. The heart of this upper is comprised of a 4150 barrel and our black nitride bolt carrier group that is finished with an incredible polish, making the action smooth and easy to keep clean.

Caliber 9mm
Length 4.5
Material 4150 Chrome Moly Vanadium
Profile Straight
Finish QPQ Corrosion Resistant
Gas System Length None
Gas Block Journal N/A
Dimpled? No
Twist Rate 1:10
Muzzle Thread 1/2x36 TPI
Weight 8.3oz
Barrel Extension Integrated
Target Crown 11 Degree

Bolt Carrier Group:

    • Colt & Glock Compatible
    • USA made 8620 Steel Carrier Construction
    • Phosphated or Nitrided Finish
    • Heavy Firing Pin Retaining Spring
    • 13.7 oz.

Upper Receiver:

This .22LR / 9mm upper receiver assembly is made from forged 7075-T6 aluminum and is Hard Coat Anodized. It meets military specifications and comes in a true slick side configuration. The ejection port door is sized for 9mm and 22LR. This upper does not have a shell deflector, nor does it have a forward assist.

  • Machined from a Mil-Spec 7075 T6 forging
  • Type III Hardcoat Anodized finish


  • 4" free float handguard
  • MIL-STD 1913 Picatinny rail on top
  • 1 M-Lok slots on 3 sides
  • Precision Machined aircraft grade aluminum, for high strength and weight savings
  • Steel Barrel nut to resist movement under heat
  • Made in USA

Charging Handle:

  • Alloy Charging Handle Assembly
  • Complete with Standard Latch
  • Made from hardcoat anodized aluminum
  • Black finish

Always Armed Black Pistol Stabilizer - Fin:

This pistol stabilizer is made from glass-reinforced polymer and built to exact tolerances. That attention to detail means the Fin fits on all pistols equipped with a standard AR15 buffer tube up to 1.25" in diameter without any need for special receiver extensions. Just slide the stabilizer on and tighten the alan key set screw for quick, secure installation.


  • Fits pistols with standard (up to 1.25" diameter) buffer tubes
  • Weighs just 5.7 ounces
  • ATF-approved for pistol used


Tactical Sport Complete AR15 LPK:

This TS Lower Parts Kit is what you need to build a custom AR15 from the ground up. Mil-spec dimensions and coating ensure the highest quality and correct component interface.

  • Safety Selector
  • Selector Spring
  • Selector Detent
  • Magazine Catch
  • Magazine Catch Spring
  • Aluminum Magazine Catch Button
  • Bolt Catch
  • Bolt Catch Detent
  • Bolt Catch Spring
  • Bolt Catch Roll Pin
  • Take Down Pin Take Down Detent
  • Take Down Detent Spring
  • Front Pivot Pin
  • Front Pivot Pin Detent
  • Front Pivot Pin Detent Spring
  • Trigger Guard
  • Trigger Guard Roll Pin
  • Buffer Retainer Detent
  • Buffer Retainer Spring
  • A2 Pistol Grip
  • Pistol Grip Screw
  • Pistol Grip Lock Washer
  • Trigger
  • Trigger Spring
  • Hammer
  • Hammer Spring
  • Disconnector
  • Disconnector Spring
  • Hammer Pin & Trigger Pin
*May come with standard “tear-drop” endplate OR ambidextrous sling loop endplate based on component availability.

Please Note: Uppers may present light fouling from our quality control process and/or test firing