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13.7 inch 5.56 NATO AR-15 Upper Kit | Pro2A Tactical

PRO2A 13.7" 5.56 NATO 1/7 Mid Length Melonite M-LOK AR-15 Upper with Flash Can Kit - Pinned & Welded

14.5 inch 5.56 NATO AR-15 Upper kit | Pinned & Welded

PRO2A 14.5" 5.56 NATO 1/7 Mid Length Melonite M-LOK AR-15 Upper with Flash Can Kit - Pinned & Welded

PRO2A 13.7" 5.56 NATO 1/7 Mid Length NR Side Charging Melonite M-LOK AR-15 Upper with Flash Can Kit - Pinned & Welded

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Special Price $849.99 $1,099.99
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SKU
P2ANR556GFS15MID137CAN-BA-KIT-PW
PRO2A 13.7" 5.56 NATO Non-Reciprocating Side Charging Upper Kit with Flash Can - Pinned & Welded

PRO2A 13.7" 5.56 NATO 1/7 Mid Length NR Side Charging Melonite M-LOK AR-15 Upper with Flash Can Kit - Pinned & Welded

Product Description

Experience advanced ergonomics, rapid structural manipulation, and the absolute shortest legal rifle blueprint possible without NFA tax stamp requirements. The PRO2A 13.7" 5.56 NATO Non-Reciprocating (NR) Side Charging Upper Kit with Flash Can completely redefines the AR-15 platform by shifting mechanical charging to a smooth, left-side layout while remaining static during firing cycles. An extended slimline flash can is permanently pinned and welded to the muzzle threads, successfully stretching the physical barrel length past the federal 16-inch minimum threshold. Operating on a tuned mid-length direct impingement setup, this configuration reduces felt recoil and system wear. The recessed flash can directs high-pressure muzzle blast and acoustic shockwaves straight downrange, while the 15-inch free-float M-LOK handguard provides a continuous, clean gripping surface. Complete with all lower receiver completion components and a rifle stock assembly, this turn-key package upgrades your stripped lower into an elite defensive carbine.

Key Features

  • Non-Reciprocating Side Charging Handle: Left-side charging mechanism permits fast weapon charging while keeping your hand on the grip and remains entirely stationary when cycling.
  • Street-Legal Pinned & Welded Configuration: Extended muzzle flash can is permanently attached down to the 13.7-inch barrel threads, ensuring an overall rifle legal measurement of 16.1 inches without short-barreled rifle registration.
  • Forward-Directing Slimline Flash Can: Significantly tames the concussive muzzle punch and intense side-blast typical of shorter carbines by managing acoustic pathways forward.
  • Extended 15-Inch M-LOK Handguard: The free-floating aluminum rail cleanly encompasses the recessed flash can layout, offering maximum mounting real estate for optics, lights, and laser setups.
  • Turn-Key Lower Completion Package: Saves you from individual component matching; arrives with a complete lower parts conversion kit and a non-braced rifle stock assembly.

Technical Specifications

Upper ReceiverGibbz Arms G4 Billet Aluminum, Non-Reciprocating Left-Side Charging Configuration, Right-Hand Ejection Port, Type III Hardcoat Anodized Black
Charging HandleLeft-Side Non-Reciprocating Charging Handle (Stays static when firing)
Bolt Carrier GroupMilspec Side-Charging M16 Full Auto Profile, 5.56 NATO Caliber, QPQ Nitride/Melonite Treated, MPI Tested, 8620 Carrier with 9310 Steel Bolt
Barrel Length & Profile13.7-Inch Medium Profile (Brings overall length to 16.1 Inches via Pin & Weld)
Caliber5.56 NATO (Safely accepts both 5.56x45mm NATO and .223 Remington factory ammunition)
Twist Rate1:7 Twist Rate (Highly optimized for stabilizing standard 62gr to heavy 77gr match ammunition)
Barrel Material4150 Chrome Moly Vanadium Steel with QPQ Melonite Nitride Finish
Gas SystemMid Length Direct Impingement with Low-Profile Gas Block
Handguard15-Inch Free Float Slim Profile M-LOK Handguard Rail System
Muzzle DeviceExtended Slimline Flash Can, 1/2x28 TPI, Permanently Pinned and Welded for Legal Compliance
Lower Parts KitComplete AR-15 Lower Parts Kit (LPK) including Pivot/Takedown Pins, Bolt Catch, Magazine Catch, Springs, Detents, Standard Pistol Grip, and Mil-Spec Fire Control Group (Trigger & Hammer Assembly)
Stock AssemblyM4 Carbine Adjustable Buttstock, 6-Position Mil-Spec Buffer Tube (Receiver Extension), Carbine Recoil Buffer, and Spring

Why Choose This Product?

The 13.7-inch pinned and welded configuration yields a highly maneuverable weapon platform without forcing the shooter into a restrictive pistol brace classification or multi-month ATF waitlists. By updating this setup with a premium, non-reciprocating side-charging upper assembly, Pro2A Tactical provides lightning-fast clearing ergonomics and a forward-blast redirecting design. It is the ultimate turnkey custom rifle kit for shooters who prioritize speed, performance, and legal rifle compliance.

More Information
SKU P2ANR556GFS15MID137CAN-BA-KIT-PW
Barrel Length 13.7 inch
Rifle Caliber 5.56 NATO
Manufacturer Pro2A Tactical
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