The XO®-26 R4 features an 11.5″ barrel and comes in 5.56 NATO. The XO-26® ships to 01/FFLs and it is not an AOW. Consequently, no NFA paperwork is required! Each XO-26® ships with a copy of the ATF approval letter signed by the Chief of the ATF Firearms Technology Branch.
Buying a complete firearm or lower from Binarytriggerusa® is easy, safe, and legal. Federal law requires all firearms be shipped to a licensed dealer.
Once you have placed your order, please have your FFL dealer email us a copy of their license, include your name, and the order number you received.
Orders cannot be processed until we receive an FFL for your order, the posted lead time will begin once your dealer’s FFL is received.
| Barrel Length | 11.5” HBar contour |
| Handguard/Upper | 11.5” FST |
| Sights | Optic Ready |
| Twist | 1X7 |
| Charging Handle | Standard |
| Bolt Carrier | FA Nitrided |
| Lower | FAI® Forged |
| Trigger | BFSIII AR-C1 |
| Vertical Grip | B5 Systems VFG |
| Gas System | Carbine-Length |
| Gas Block | Low Profile |
| Muzzle Device | Triumvir® |
| Color | Black |
| Grip | B5 Systems P-Grip |
| Calibers | 5.56 NATO |
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