PRO2A 18" 350 Legend NR Side Charging AR-15 Upper Kit

PRO2A 18" 350 Legend 1/16 Carbine Length NR Side Charging Melonite M-LOK AR-15 Upper Kit

Product Description

The PRO2A 18" 350 Legend Non-Reciprocating (NR) Side Charging Upper Kit is an all-inclusive rifle completion package engineered for builders wanting maximum structural balance and performance out of the straight-walled 350 Legend cartridge. This premium kit swaps out the classic top charging configuration for a rigid, ergonomic side charger, packing together the complete upper assembly, specialized carrier group, full lower completion parts, and an adjustable stock system to turn a stripped lower receiver into a field-ready hunting rifle.

Key Features

Non-Reciprocating Side Charging System: Rigid billet receiver features an ergonomic side handle that remains completely stationary and forward while firing strings.
All-In-One Rifle Completion: Includes all foundational upper components alongside a full premium lower parts kit and matching buffer/stock assembly.
Straight-Walled Hunting Efficiency: Optimized 350 Legend chambering paired with an 18-inch profile maximizes dwell-time ballistics and downrange energy thresholds.
Premium Melonite Structural Barrel: 4150 CMV steel liquid nitrided for extreme weather defense, uniform heat dissemination, and extended barrel life.

Technical Specifications

Upper Receiver	Gibbz Arms G4 Billet Aluminum Right Handed Receiver (Side Charging Architecture)
Charging System	Non-Reciprocating Left-Side Side Charging System (Handle stays static while cycling)
Bolt Carrier Group	Milspec M16 Profile, QPQ Nitride/Melonite Treated, MPI Tested
Barrel Length & Profile	18-Inch Medium Profile
Caliber	350 Legend
Twist Rate	1:16 Twist
Barrel Material	4150 Chrome Moly Vanadium Steel with Premium Melonite Treatment
Gas System	Carbine Length Direct Impingement with Low-Profile Gas Block
Handguard	15-Inch Free Float Slim Profile M-LOK Handguard Rail System
Muzzle Device	A2 Flash Hider (5/8x24 Thread Pitch)
Lower Parts Kit	Complete AR-15 Lower Parts Kit (LPK) including Pivot/Takedown Pins, Bolt Catch, Magazine Catch, Springs, Detents, Standard Pistol Grip, and Polished Mil-Spec Fire Control Group (Trigger & Hammer)
Stock Assembly	M4 Carbine Adjustable Buttstock, 6-Position Mil-Spec Buffer Tube (Receiver Extension), Carbine Recoil 3oz Buffer, and Spring

Why Choose This Product?

This premium 18-inch kit updates the traditional AR layout into a smooth, leverage-focused platform. By pairing a high-end non-reciprocating side charger with an optimized straight-walled barrel assembly, complete lower components, and a stable stock structure, this unified package delivers enhanced physical clearance, easy manual cycling under large optics, and superb reliability out on the hunt.

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