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The XO-26™ features an 11.5" barrel and comes in 5.56 NATO (.223 Remington,) 6.8 SPC, 300 Blackout or 450 Bushmaster.  The XO-26™ ships to 01/FFLs, and it is not an AOW.  Consequently, no NFA paperwork is required!  You may download a copy of the ATF approval letter signed by the Chief of the ATF Firearms Technology Branch below.

ATF Letter

Here are some videos:
XO-26™ Operations     XO-26 Recoil     XO-26 on Watermelons    

Product Details:

The XO-26™ is a cross over between rifles and pistols.  The 26 refers to the absolute minimum length of the firearm as allotted by federal law.  However, we chose to make the length an inch longer than necessary so that it would still be long enough to qualify as a non-AOW even if the muzzle device was removed.  This length also makes it easier to see the chamber indication.

Chambered in 5.56 NATO, 6.8 SPC, 300 Blackout and 450 Bushmaster
Salt Bath Nitride Chamber, Bore, & Finish
11.5" Barrel with 1/7-In. Twist in 5.56 NATO, 1/10-In. Twist in 6.8 SPC,
1/8-In. Twist in 300 BLK, 1/24-In. Twist in 450 BM
Low Profile Gas Block and Carbine Length Gas System
Franklin Armory™ FST™ M-Lok Handguard
Toothed Flash Hider (Compensator on 450 Bushmaster)

Upper Receiver:
A4 Flat Top Forged from 7075-T6 Aluminum
Full Picatinny Rail
Hard Coat Type III Anodized Black
Pop Up Front and Rear Sights
Salt Bath Nitride Bolt Carrier Group
Forward Assist

Lower Receiver:
Forged 7075-T6 Aluminum with Hard Coat Type III Anodized Black
Ambi Sling Mount
Specialized Tension Screw - Eliminates Upper/Lower Play
Franklin Armory™ Factory Custom Tuned Trigger
Padded Receiver Extension/Buffer Tube
Magpul MIAD Grip

Magpul Pmag P30 for 5.56 NATO and 300 Blackout
25 Round Stainless Steel “Marlube” coated Magazine for 6.8 SPC
30 Round Stainless Steel “Marlube” coated Magazine for 7.62x39
9 Round Stainless Steel “Marlube” coated Magazine for 450 Bushmaster
Reduced capacity magazine for Restricted States.

Additional Features:
Comprehensive Safety Manual
California Certified Cable Lock
Complimentary Lockable Case