5.56 NATO 16" Incursion Complete Upper Assembly
High-quality and precisely designed, built, tuned, and tested by the professionals at Alexander Arms® using only the best components we can manufacture


- Flat-top receiver with mid-length gas system
- M16-style carrier group
- G10 composite rifle-length MK10 handguard
- 16-inch chrome moly, very lightweight barrel with 1:7 twist and melonite finish
- Muzzle threading is 1/2-28 TPI RH
- Direct impingement operating system
Extended feed ramps
- Carrier gas keys are properly staked
- One complimentary 30-round E-Lander steel magazine, unless prohibited by local or state law, where the product will ship with no magazine included
- Weight of upper is 3.8 pounds

This unit is 100% complete and is compatible with any standard-specification lower receiver (no modifications required)

All uppers and rifles are built to order and have an estimated lead time of 4-6 weeks.
Charging Handle Upgrade - Please select this option if you would like to upgrade to the Raptor Ambidextrous charging handle.
Muzzle Upgrades - Please select a muzzle upgrade
Handguard Upgrade - Please select a handguard upgrade. For additional details, click the name of each handguard option.
Camo Upgrades - Select a camo or cerakote upgrade. Requires a non-refundable deposit of the camo upgrade price once the order enters production. Camo is applied to handguard and receiver only. Hydrodipped patterns cannot be combined with Manticore Arms Transformer Rail. Cerakote options (solid colors) can be applied to any handguard upgrade available.
Base Price: $719.25
Selected Options: $0.00
Total Price: $719.25
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All Alexander Arms® upper receiver assemblies are fully-complete, function-tested, and ready to fire.

This product features a flash hider that is prohibited in states such as New York, New Jersey, and Connecticut. At this time, no upgrade options or alternate muzzle devices are available. The standard, high-capacity magazines included with the upper receiver assembly are prohibited in states that have high-capacity magazine restrictions. Alternate magazines are not available at this time. Orders placed from any of these states will be shipped without the complimentary magazines.

Approx Weight: 3.80 lb. / Each
Dimensions (LxWxH): 26.00 x 3.00 x 3.00 in.
Would you like rail sections for your MK10 handguard? - Rail sections are sold separately and individually. Don't forget your MK10 handguard rail sections!
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