FoldAR MoBetta Barrel System


Categories: Barrel Systems

FoldAR MoBetta Barrel Systems allow you to create your ideal One Rifle weapon system. With its quick-change barrel system and the unprecedented concealability that FoldAR brings to the table, the MoBetta Barrel System easily and quickly configures your weapon system into the One Rifle to Rule Them All. Barrel Systems are only available to current owners of a FoldAR MoBetta firearm or complete upper, and can be delivered to your home address (No FFL Required)!

View cerakote galleryCerakote warranty information
In Stock

Cerakote adds 5-15 days of processing time.

None Sniper Grey +$75.00 MilSpec OD Green +$75.00 Elite FDE +$75.00
Estimated Delivery: 5-15 Days

One Rifle: an extraordinary rifle designed to accomplish multiple configurations of calibers and barrel lengths without compromising any areas of performance, reliability, safety or accuracy. History of the “One Rifle” begins in 1920 and ends with FoldAR leaping far beyond the “One Rifle” concept in 2023.

One Rifle to Rule Them All: an exceedingly extraordinary rifle, having all the advantages of the “One Rifle”, but also including the ability to conceal inside an EDC backpack, remain fully assembled, and be deployed within seconds.

Create and configure your ideal Concealed Carry RifleTM with an additional FoldAR® MoBetta® Barrel System. Our patented folding upper gives you the highest level of concealability possible without sacrificing any areas of performance, reliability, weight, or safety when attached to your FoldAR MoBetta firearm or Complete Upper. The FoldAR MoBetta Barrel System is interchangeable within seconds, allowing you to configure an “all-applications” weapon system kit within one easily transportable package.

Important Notes:

  • Only for owners of a 2023 FoldAR MoBetta firearm or complete upper.
  • Not interchangeable with third part upper receivers or 2018-2022 FoldAR products.
  • Swapping between 6.5 Grendel and .300 AAC Blackout or 5.56×45 NATO requires a bolt/BCG swap.
  • Swapping between .300 AAC Blackout and 5.56×45 NATO does not require a bolt/BCG swap.

One Rifle – Barrel Selection Guidelines:

  • 9.0″ – Our most popular barrel length for CQB-work because of its ability to remain suppressed while maintaining concealability [Colion Noir] within a small 16″ EDC sling-pack. Combined with a collapsed stock or pistol brace and a compact suppressor (6″), our 9.0″ barrel allows the weapon system to fold in half, at 14.75″.
  • 10.5″ – Custom Order Request. We have not pursued this intermediate short barrel length because it offers no ballistic or concealment advantages over the 12.5″ barrel, as both will still fold down to 14.75″. However, for some operators and requirements there may be a slight ballistic and concealment benefit in a 10.5″ that rests between our 9.0″ and 12.5″ configurations.
  • 12.5″ – Our most popular barrel length for precision gunfighters because of its mid-range capability while maintaining concealability within a small 16″ EDC sling-pack. Combined with a collapsed stock or pistol brace, our 12.5″ barrel allows the weapon system to fold in half, at 14.75″. It should be noted, this setup can still squeeze into most 18″ EDC packs when a compact suppressor is installed (6″). If having a suppressor that remains attached during concealment is not your priority, then our 16.0″ barrel will deliver the highest ballistic performance.
  • 14.5″ – Custom Order Request. We have not pursued this intermediate barrel length because the concealment benefit over our 16.0″ is not significant. However, some operator requirements may find the slight ballistic and concealment benefit for a special application.
  • 16.0″ – Our most popular among civilians, marksmen and hunters because of its Always-Non-NFA legal status and its capabilities of performing at distance with precision [Alabama Arsenal] and its ability to continuously return to zero [Pew Pew Tactical]. Combined with a collapsed stock, our 16.0″ barrel allows the weapon system to fold slightly over half, at 17.75″. If a full-length fixed rifle stock was attached, it would fold in half, also at 17.75″.

One Rifle – Caliber Selection Guidelines:

  • 5.56×45 NATO – We chamber and identify our barrel as .223 Wylde, as the best chamber design to safely and precisely accept a variety of both .223 Remington and 5.56×45 NATO ammunition. Choose this caliber for the widest availability of affordable ammunition for training to precision hunting, as well as various Law Enforcement and Defense applications.
  • .300 AAC Blackout – Choose 300BLK for its wide spectrum of performance in delivering suppressed energy.
  • 6.5 Grendel – Choose 6.5 Grendel for its stability and higher energy delivery and at distance.
Weight N/A
Dimensions N/A



Barrel System

Barrel Length

9.0", 12.5", 16.0"


5.56×45 NATO (.223 Wylde), .300 AAC BLACKOUT, 6.5mm Grendel

Overall Length

10-3/4" [27.3 cm], 14-3/8" [36.5 cm], 17-5/8" [44.8 cm]


6.2 lbs [2.8 kg], 6.8 lbs [3.1 kg]

Barrel Material

4150 Cold Hammer Forged, 4150 Match Button Pulled

Barrel Coating

QPQ Melonite

Barrel Twist

1:7 (5.56×45 NATO), 1:7 (.300 AAC Blackout), 1:8 (6.5mm Grendel)

Muzzle Threads

1/2"-28, 5/8"-24

Muzzle Device

A2 Compensator (1/2"-28), A2 Compensator (5/8"-24)

Gas System Length

Pistol, Carbine, Mid


Fully Adjustable (.750" Diameter)

Rail Configuration

Magpul M-Lok

Latch Material

4140 Alloy Steel (Forged)

Chassis Material

7075-T6 Aluminum (Forged)


MIL-A-8625 (Type 3/Class 2 Hardcoat Anodized)


There are no reviews yet.

Only logged in customers who have purchased this product may leave a review.

Premium quality

100% made and manufactured in the USA

Lifetime warranty

We guarantee every product we manufacture

Veteran owned

Proudly owned and operated by US veterans

Cerakote warranty information

Integer nec odio. Praesent libero uctus non, massa. Sed cursus ante dapibus diam. Sed nisi. Nulla quis sem at nibh elementum imperdiet. Duis sagittis ipsum. Praesent mauris himenaeos. Fusce nec tellus sed augue semper porta.