SIONICS 11.5″ Upper Receiver Group

(4 customer reviews)

from: $61995

The SIONICS 11.5″ Upper Receiver is a fully complete Upper Receiver Group, designed for the most accurate and durable configuration. They are fully assembled, headspaced, and test fired to ensure reliability and accuracy.

FOR QUESTIONS ON WHAT TYPE OF GAS PORT YOU SHOULD CHOOSE WHEN EQUIPPING A SILENCER, PLEASE REFER TO THE GUIDE BELOW. 

Estimated Completion Date August 20, 2024 - August 23, 2024
SKU: N/A Category: Product ID: 6884

Description

If you choose either the Silencer Dedicated or Extreme Reduced Gas Port Barrel, your Complete Upper Receiver will not come with the SIONICS A2 Style Flash Hider. If desired, you can send your own muzzle device to be installed on your Upper Receiver. If you would like to use your own Muzzle Device, please email sales@sionicsweaponsystems.com and you will receive instructions for mailing. 

The SIONICS Extreme Reduced Gas Port Barrel is a silencer-optimized barrel that is designed to work with .30 caliber or full-size silencers. The reduced gas port helps to minimize gas blowback, felt recoil, and carbon build-up, resulting in a smoother and more comfortable shooting experience. THE SIONICS EXTREME REDUCED GAS PORT BARREL IS NOT DESIGNED FOR USE WITH FLOW-THROUGH SILENCERS.

Here are some of the benefits of using the SIONICS Extreme Reduced Gas Port Barrel:

  • Reduced gas blowback: The reduced gas port helps to reduce the amount of gas that is expelled from the barrel when the gun is fired. This can help to reduce the amount of gas that is blown back into the shooter’s face, which can be uncomfortable and can also cause eye irritation.
  • Reduced felt recoil: The reduced gas port also helps to reduce the amount of felt recoil that the shooter experiences. This is because the reduced gas port helps to slow down the movement of the bolt carrier group, which in turn reduces the amount of recoil that is felt by the shooter.
  • Reduced carbon build-up: The reduced gas port also helps to reduce the amount of carbon build-up that occurs inside the gun. This is because the reduced gas port helps to reduce the amount of gas that is expelled from the barrel, which in turn reduces the amount of carbon that is deposited inside the gun.

 

The SIONICS Silencer Dedicated Barrel has the smallest gas port and is designed to work with silencers with a lot of back pressure like K sized (short) silencers. The reduced gas port helps to minimize gas blowback, felt recoil, and carbon build-up, resulting in a smoother and more comfortable shooting experience. THE SIONICS SILENCER DEDICATED BARREL IS NOT DESIGNED FOR USE WITH FLOW-THROUGH SILENCERS.

Here are some of the benefits of using the SIONICS Silencer Dedicated Barrel:

  • Reduced gas blowback: The reduced gas port helps to minimize the amount of gas that is expelled from the barrel when the gun is fired. This can help to reduce the amount of gas that is blown back into the shooter’s face, which can be uncomfortable and can also cause eye irritation.
  • Reduced felt recoil: The reduced gas port also helps to reduce the amount of felt recoil that the shooter experiences. This is because the reduced gas port helps to slow down the movement of the bolt carrier group, which in turn reduces the amount of recoil that is felt by the shooter.
  • Reduced carbon build-up: The reduced gas port also helps to reduce the amount of carbon build-up that occurs inside the gun. This is because the reduced gas port helps to reduce the amount of gas that is expelled from the barrel, which in turn reduces the amount of carbon that is deposited inside the gun.

Should you still have questions about what port size to choose please do not hesitate to give us a call at 520-396-3460. 

Base Configuration

Upper Receiver: 7075 M4 AR15 Style 5.56mm NATO
BarrelSIONICS 11.5” Medium Contour – 41V50, NATO Chamber, 1:7, 5R Rifling, Chrome Lined, Air-Gauged, Radiograph and MP Inspected
Barrel Gas Port Size: SIONICS Standard Size Gas Port
Gas System: Carbine-Length – Direct-Impingement
Muzzle Device: SIONICS A2 Style Flash Hider – If the 11.5″ Silencer Dedicated or Extreme Reduced Gas Port Barrel is selected, there will not be an A2 Style Flash Hider installed.
Hand Guard: SIONICS 10.8″ M-LOK Handguard

Optional Installed Add-Ons:

Barrel Gas Port Size: SIONICS 11.5″ Silencer Dedicated Barrel or SIONICS 11.5″ Extreme Reduced Gas Port Barrel
Bolt Carrier Group: SIONICS Phosphate Coated BCG or SIONICS NP3 Coated BCG
Charging Handle: Radian Raptor Ambidextrous Charging Handle
Iron Sights: Magpul MBUS or Magpul MBUS Pro
Option to send in your muzzle device to be installed onto the Silencer Dedicated or Extreme Reduced Gas Port Barrel’s

It is the buyer’s responsibility to make sure they comply with all NFA rules and applicable laws.

Key Features of the SIONICS Upper Receiver

SIONICS Warranty

SIONICS WARRANTY

All SIONICS Weapon Systems Firearms, Receivers and Parts are manufactured for a Lifetime of Hard Use. With that said, we do expect you to use your SIONICS products, and if needed, trust that we would have you covered if your product fails.

SIONICS COMPLETE FIREARMS, UPPER RECEIVERS AND LOWER RECEIVERS WARRANTY

SIONICS Weapon Systems Complete Rifles, Complete Upper Receivers and Complete Lower Receivers are Guaranteed to Run for Life, Period. If you shoot out the barrel, we’ll replace it. If you need replacement parts, we’ll send them to you. If you break your Rifle, we’ll fix it. If your Rifle is taken into evidence after Justifiable Use of Deadly Force, we’ll replace it for you. Let’s break that down for you.

  • Who is Covered – Anyone with an unaltered Complete SIONICS Firearm, Upper Receiver or Lower Receiver
  • What is Covered –  Anything and Everything related to the function of Complete Firearms, Upper Receivers and Lower Receivers
  • What is Not Covered 
    • Modifying the internals of the Complete Firearm, Upper Receiver or Lower Receiver.
    • Using Non-Factory Ammunition (aka Reloads)
    • Careless Handling, Abuse or Misuse
    • Rust or Corrosion
    • Barrel Obstruction
    • Altering or Modifying existing Parts
    • Damages caused by failure to perform normal maintenance
    • Damages due to high velocity, high pressure, reloaded, remanufactured, or other non-standard ammunition
    • Cosmetic damages
    • Dimensional alterations caused from Cerakote or Paint (for example the removal of too much material or the addition of too much material altering the tolerance of components)
  • How Long is it Covered – Lifetime of the unaltered Complete Firearm, Upper or Lower Receiver
  • How will it be Covered – All Deemed Defective Parts will be either Repaired or Replaced by SIONICS staff

    WARRANTY PROCESSING INSTRUCTIONS

Step 1:

Call 520.396.3460 (Monday – Thursday 7:00 – 17:00 MST) and speak with one of our Excellent SIONICS staff to begin the troubleshooting process of your product. If deemed necessary you will then obtain an RMA# (Return Merchandise Authorization) to initiate the warranty claim. Outside of business hours please email us at warranty@sionicsweaponsystems.com

Step 2:

Once established that your item should return to SIONICS for further inspection, you will need to ship your defective/non-working item.

Return the item to our facility:
Make sure your assigned RMA# is clearly displayed on the outside of all return packages. This is necessary to match each package to the correct warranty claim. In addition please include a document listing your RMA#, Name, Phone Number as well as email address.

ATTN: Warranty Department
SIONICS Weapon Systems
5118 E. Pima Steet
Tucson, Arizona 85712

Step 3:

Our team here at SIONICS will work quickly to process your claim. Once your item is received, we will inspect and test within one business day. If the item is deemed defective, we will communicate back to you on your claim with the appropriate plan for repair or replacement.

4 reviews for SIONICS 11.5″ Upper Receiver Group

  1. Cade Prutzman

    Hands down the best bang for buck receiver out there. Every part of it is quality made and assembled, zero malfunctions over 1.2k rounds in. Perfectly gassed and feels like smooth glass to manipulate. I’ll be buying Sionics for all my future builds.

  2. Redacted

    Best upper receiver I’ve ever used. Ive had it for about 2 years and 10,000 rounds and I’ve yet to have a malfunction still. Great warranty for when my barrel gets shot out or anything happens. Sionics over BCM any day.

  3. William Mcalpin (verified owner)

    Best Upper On the market perfectly gassed first range trip 250rds without any Malfunctions zero oil. paired with springco green and a5h2 buffer gave me perfect ejection pattern

  4. William Mcalpin (verified owner)

    Best in the business hands down first range visit put 250 rounds through it without a problem perfectly gassed with perfect ejection highly recommended

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Here at SIONICS, we test fire EVERY BCG, upper receiver group, and firearm.

Our test firing process is simple:

  • BCGs get 5 rounds of M193 and another single round in a separate magazine to ensure function, ejection pattern, and lock-back.
  • All upper receiver groups and firearms get 7 rounds of M193 and another single round in a separate magazine to ensure function, ejection pattern, and lock-back.

SIONICS handguards are incredibly rigid and the inherent design features ensure anti-rotation. Through rigorous testing both by SIONICS and the many LE agencies using SIONICS rifles we can ensure zero retention when using IR/VIS aiming devices.

SIONICS handguards feature QD attachment points at the forward and rear 3 and 9 o’clock positions. SIONICS QD receiver sockets are anti-rotational.

The SIONICS barrels utilize 5R Rifling. 5R Rifling helps fight bullet failure due to a softer angle on the sides of the lands vs. conventional style rifling that utilizes 90° corners of the lands, which is a very hard edge.  Furthermore, with 5R, you have 5 lands in the bore of the barrel.  The odd number of lands does not directly oppose one another. The combination of these two things deforms the bullet less – less distortion to the bullet jacket when the bullet makes the jump from the case into the rifling.  This helps fight bullet failure and increases the inherent accuracy of the barrel.  Lastly, the gentler edges of lands on the 5R Rifling allow easier cleaning of the bore.  The 90° corners of conventional rifling make it harder to reach lead and other contaminants when cleaning.  The softer edges of the lands on 5R Rifling allow for a much more thorough cleaning process.

By sending all of our barrels to Radiograph, or X-Ray testing we are able to identify possible structural defects within the barrel.

This is an example of a barrel defect that would not be detected to the naked eye.