The SIONICS 11.5” Chrome Lined Barrel is a high-quality barrel that is made from 41V50 Chrome Moly Vanadium Steel. It has a medium contour, a carbine-length gas system, and a .750″ gas seat diameter. The barrel feature hand-polished feed ramps and has a 1/7 twist rate. It is also threaded 1/2×28 and is manganese phosphate coated. The barrel is magnetic particle inspected and radiograph inspected. It is pre-dimpled for easy installation of the gas block. This barrel is a great choice for a general purpose pistol or SBR.
Features:
11.5” Chambered in 5.56 NATO
41V50 CMV Steel
Manganese Phosphate Coated
Chrome Lined
Medium Profile
.750″ gas seat diameter
1/7 Twist Rate
Carbine Gas System
Magnetic Particle Inspected
Weight: 1 Lb. 6 oz.
Radiograph Inspected
Threaded 1/2×28
Hand Polished Feed Ramps
Pre-Dimpled for easy Gas Block Installation
OPTIONAL ADD-ONS:
Melonite Gas Tube w/ included roll pin
4140 manganese phosphate coated gas block w/ included enhanced knurled set screws
Additional information
Add Gas Block
No, Yes – Add Gas Block
Add Gas Tube
No, Yes – Add Gas Tube
Key Features of the SIONICS Upper Receivers and Barrels
SIONICS Warranty
SIONICS WARRANTY
The SIONICS Warranty
All SIONICS Weapon Systems Firearms, Receivers and Parts are manufactured for a Lifetime of Hard Use. The definition of a Warranty is a Guarantee from a manufacturer that a defective product will be repaired or replaced.
SIONICS Parts Warranty (Barrels, BCGs, LPKs etc.)
All SIONICS Weapon Systems Parts carry our Guarantee against defects in original materials and workmanship. If any SIONICS product shows evidence of such defects, we will fix, repair, or replace your product with that of an equal value product. SIONICS Weapon Systems does not warranty products or damage caused to our products by the correct or incorrect installation of other manufacturer’s products.
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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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.
Our 11.5″ and 12.5″ barrels come only in a 1/7 twist rate and our 16″ barrel comes in a 1/8 twist rate.
Our barrels are Manganese Phosphate coated. Manganese Phosphate is coating on the outside of the barrel using a sprayed or immersed salt bath to achieve a somewhat porous finish that then more readily accepts and holds lubrication to help prevent corrosion.
Chrome lining is a treatment applied to the inside of SIONICS barrels. Chrome lining is essentially an alternative to a Melonite/nitride finish. During this process, chrome is applied to the lands and grooves of the barrel’s rifling, as well as the chamber. In order to ensure accuracy with this extra material, chrome-lined barrels are typically bored out more than the final internal diameter. The tolerances are made up by adding the chrome to the inside of the bore.
Nope. That is why we have our strict QC Process and test-firing procedures.
The quick answer; as long as it’s 5.56 or .223 then it will work great. That being said, we test fire all of our firearms, uppers and BCG’s using Magtech M193 55gr 5.56 ammunition.
Currently all of our barrels are chambered in 5.56 NATO.
Our test rifle, “Chuck Norris”, has had over 200,000 rounds through it with very little cleaning or maintenance and still runs great, so you be the judge.
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.
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