RTB Rifle Build Kit - 5.56 16" Complete Upper Receiver M4 6-Positon Stock Kit XTS LPK - $315.03

Description

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

This Complete 16 inch M-LOK upper receiver comes with a 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 M4 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:

16" 5.56 4150 CMV Barrel - Black Nitride
M4 Carbine Profile - .750" GB Journal
1:7 Twist Rate - 1/2x28 Muzzle Thread
Fitted with A2 Flash Hider

Bolt Carrier Group:

Enhanced 9310 Steel (Bolt)
8620 Tool Steel (Carrier)
Bolt is shot Peened and MPI
All BCG components 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

Handguard:

15" Lightweight - Free Float M-LOK

Charging Handle:

Forged 7075 Aluminum construction
Mil-Spec Type-III Hardcoat Anodized finish

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

XTS AR15 Complete Lower Parts Kit:

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

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
Polymer 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

Please Note: Every upper is test fired during our quality control process and may present light fouling

SKU: RBK-RTB16C55612RA2-TS-M4-6POS-XTS
UPC: 696969697060