FoldAR^® Complete Upper

The FoldAR^® Complete Upper delivers the core of the One Rifle system—fully assembled, duty-ready, and engineered around FoldAR’s patented folding-barrel interface. Compatible with standard AR lowers, it provides instant access to tool-less barrel changes, return-to-zero accuracy, and unmatched compactness—transforming any lower into a true Concealed Carry Rifle.

Maintains Zero After Every Fold

The patented FoldAR locking system ensures repeatable alignment every time the rifle is deployed. Optics retain zero through repeated folding cycles — eliminating the need for re-zero after transport.

General Specifications

NFA?: non-NFA
Configuration: Complete Upper
Barrel Length: 7.5"
9.0"
10.5"
12.5"
16.0"
Caliber: 5.56x45 NATO (.223 Wylde)
.300 BLACKOUT
7.62x39
.350 Legend
Overall Length: 32-7/8” [83.5 cm]
Folded Length: 17-5/8" [44.8 cm]
Folded Width: 4-1/4" [10.8 cm]
Weight: 6.0-6.9 lbs

Barrel System Specifications

Barrel Material: 4150 Cold Hammer Forged
Carbon Fiber/416R Stainless (Proof)
Barrel Coating: QPQ Melonite
Barrel Twist: 1:7 (5.56x45 NATO)
1:7 (.300 Blackout)
1:9.5 (7.62x39)
1:16 (.350 Legend)
Muzzle Threads: 1/2"-28 (5.56x45 NATO)
5/8"-24 (.300 Blackout)
5/8"-24 (7.62x39)
1/2"-28 (.350 Legend)
Muzzle Device: A2 Compensator (1/2"-28)
A2 Compensator (5/8"-24)
Gas System Length: Rifle
Pistol
Carbine
Mid
Gasblock: Fully Adjustable (.750" Diameter)
Bolt Carrier Group: MilSpec Black Nitride

Chassis Specifications

Chassis Material: 7075-T6 Aluminum (Forged)
Finish: MIL-A-8625 (T3/C2 Anodized)
Rail Configuration: Magpul M-Lok

Performance at a Glance

Accuracy:
Sub-MOA Capable With Match Ammunition

Deployment:
Ready To Fire In Under 2 Seconds

Concealment:
Folds Between 12"-18" - Backpack Ready

Effective Engagement - 7.5" 5.56x45:
250m

Effective Engagement - 7.5" 300BLK:
300m

Effective Engagement - 7.5" 7.62x39:
(N/A) 300m

Effective Engagement - 9" 5.56x45:
300m

Effective Engagement - 9" 300BLK:
400m

Effective Engagement - 9" 7.62x39:
(N/A) 350m

Effective Engagement - 10.5" 5.56x45:
400m

Effective Engagement - 10.5" 300BLK:
450m

Effective Engagement - 10.5" 7.62x39:
400m

Effective Engagement - 12.5" 5.56x45:
500m

Effective Engagement - 12.5" 300BLK:
500m

Effective Engagement - 12.5" 7.62x39:
(N/A) 450m

Effective Engagement - 16" 5.56x45:
600m

Effective Engagement - 16" 300BLK:
550m

Effective Engagement - 16" 7.62x39:
500m

Effective Engagement - 16" 350 Legend:
300m

Effective Engagement - 16" 6ARC:
(N/A) 800m

Effective Engagement - 16" 22ARC:
(N/A) 900m

Engineered Under Stress

Every Watchman platform undergoes extensive thermal and structural testing to ensure reliability under sustained fire and extreme operating conditions.

Standard Extension Stress Plot

Thinner wall geometry concentrates stress at the extension lugs, producing higher localized stress under identical loading conditions and increasing fatigue exposure.

FoldAR Extension Stress Plot

The FoldAR tapered extension incorporates a thicker wall section at the lug interface, reducing peak stress concentration and shifting load away from critical areas.

Heart of the FoldAR System

At the core of every FoldAR is a patented folding-barrel interface engineered at the barrel-to-receiver junction—the strongest, most repeatable location possible. This is where accuracy is won or lost, and why FoldAR performs like a fixed-barrel rifle when it matters most.

The same interface enables tool-less barrel and caliber changes in seconds, allowing One Rifle to adapt to multiple roles without sacrificing alignment, reliability, or return-to-zero... while adding additional strength where it matters most.

No tools. No loss of zero. No compromises.
One Rifle—engineered to do more.