Rifle Build Kit - 5.56 | RTB Complete 16" Upper Receiver | M4 6-Positon Stock Kit | BN LPK

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Product Code: RTB1655615-BLK-IBOR-LPK-TSM4
MSRP: $649.75
Sale Price: Sale Price: $444.95
$444.95
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Rifle Build Kit - 5.56 | RTB Complete 16" Upper Receiver with A2 | M4 6-Position Stock and Buffer Tube Kit | Bare Necessities Lower Parts Kit w/ Enhanced Aluminum Trigger Guard

This product is manufactured based on parts on hand. It may feature a standard or oversized trigger guard, depending on what we have available at the time.


RTB Complete 16" 5.56 Carbine Upper Receiver | 15" M-LOK | BCG & CH:


This Complete 16 inch M-LOK upper receiver comes with our RTB 15 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.

Barrel:

  • LENGTH - 16"
  • MATERIAL - 4150 CHROME MOLY VANADIUM
  • 11-DEGREE TARGET CROWN - FURTHER IMPROVE ACCURACY
  • PROFILE - M4
  • FINISH - QPQ CORROSION RESISTANT
  • GAS SYSTEM LENGTH - CARBINE
  • GAS BLOCK JOURNAL - .750" GAS BLOCK JOURNAL
  • TWIST RATE - 1/7 TWIST
  • MUZZLE - 1/2X28 THREADED
  • WEIGHT - 28OZ

 
Bolt Carrier Group:

  • Enhanced 9310 Steel (Bolt)
  • 8620 Tool Steel (Carrier)
  • Bolt is shot Peened and MPI
  • All BCG components are pre-polished before being processed and then post polished for an incredible shine


Upper Receiver:

  • Machined from a Mil-Spec 7075 T6 forging Hard Coat Anodized per Mil-A-8625F, Type III
  • M4 Feed ramps
  • Made in the U.S.A.


Handguard:

  • MATERIAL: HARD COAT ANODIZED ALUMINUM HANDGUARD, ALUMINUM BARREL NUT
  • PRECISION BORE
  • ACCEPTS M-LOK RAIL SECTIONS & ACCESSORIES
  • 7075-T6 BARREL NUT
  • RAIL LENGTH IS MEASURED ALONG THE TOP
  • INNER DIAMETER: 1.36"


Charging Handle:

  • Tried and True Standard Charging Handle
  • Forged 7075 Aluminum construction
  • Mil-Spec Type-III Hardcoat Anodized finish
  • Caliber - .223 / 5.56 / 300 Blackout
  • Made in the USA

 


Tactical Sport 6-Position M4 Stock Kit:

This polymer stock is made from impact-resistant, high-strength material.

  • Mil-spec Diameter Extension Tube Made from Aircraft Aluminum with Rolled Threads
  • Built for Heavy-duty Operations with Tightest Tolerance Control
  • Stock Assembly Complete with Action Spring, Buffer Assembly, Tear-drop Ring, and Castle Nut


Bare Necessities AR15 Complete Lower Parts Kit:

With everything you need for a complete lower, including every spring, pin, the Bare Necessities LPK makes your rifle truly complete by including the all-important Safety, Mag Catch, Hammer and Trigger, Take Down, and A2 Standard Grip. 

Components:

  • Disconnector Spring
  • Hammer Pin & Trigger Pin
  • 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
  • Aluminum 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

 *May come with standard “tear-drop” endplate OR ambidextrous sling loop endplate based on component availability.
*This product is manufactured based on parts on hand. It may feature a standard or oversized trigger guard, depending on what we have available at the time. Also, it may have a standard curved trigger or a flat trigger.*

Flat or Straight Trigger

Please Note: Uppers may present light fouling from our quality control process and/or test firing
SKU:
RTB1655615-BLK-IBOR-LPK-TSM4