What is your test firing process?

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.

How well does your handguard retain zero?

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.

Are there sling attachments on the handguard?

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

Whats difference between conventional style rifling and your 5R rifling?

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.

What are you looking for when you X-Ray barrels?

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.

SIONICS 14.8″ Upper Receiver Group

from: $59995

The SIONICS 14.8″ 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 CLICK HERE.

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.

Choose a Gas Port Size

Add Bolt Carrier Group

Add Charging Handle

Add Iron Sights

Clear

Estimated Completion Date January 2, 2025 - January 7, 2025

SKU: S-UR-N-ACH-NS-125-1 Category: Upper Receiver Groups Product ID: 17022

Description

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
Barrel: SIONICS 14.8” Medium Contour Barrel – 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: Mid-Length – Direct-Impingement
Muzzle Device: SIONICS A2 Style Flash Hider – If the 14.8″ Silencer Dedicated or Extreme Reduced Gas Port Barrel is selected, there will not be an A2 Style Flash Hider installed.
Hand Guard: SIONICS 14.125″ M-LOK Handguard

Optional Installed Add-Ons:

Barrel Gas Port Size: SIONICS 14.8″ Extreme Reduced Gas Port Barrel or SIONICS 14.8″ Silencer Dedicated 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.

Additional information

Choose a Gas Port Size	Extreme Reduced Gas Port, Silencer Dedicated Gas Port, Standard Gas Port
Add Bolt Carrier Group	No – No Bolt Carrier Group Included, Yes – Include Phosphate BCG, Yes – Include NP3 Coated BCG
Add Charging Handle	No – No Charging Handle Included, Yes – Add Radian Raptor Charging Handle
Add Iron Sights	No – No Iron Sights Included, Yes – Add MBUS, Yes – Add MBUS PRO

Key Features of the SIONICS Upper Receiver

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.

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SIONICS 14.8″ Upper Receiver Group

SIONICS 14.8″ Upper Receiver Group

Description

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

Additional information

Key Features of the SIONICS Upper Receiver

SIONICS Warranty

WARRANTY PROCESSING INSTRUCTIONS

Reviews

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