AR-15 Uppers

6.5 Grendel | AR-15 Uppers
All Alexander Arms® upper receiver assemblies are fully-complete, function-tested, and ready to fire. All available products and options are visible in the Online Store. We do not produce custom weapons.
Lightweight 18" button-rifled, fluted stainless steel barrel with a 1:7.5 twist rate, G10 composite free-floating handguard, Picatinny railed gas block, A2 flash hider, 9/16-24 threaded muzzle (non-optional). Direct impingement operating system. Ships with one 10-round magazine. Weight of upper is 4.3 pounds. This unit is 100% complete and is compatible with any standard-specification lower receiver (no modifications required).
$760.00
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Lightweight 10.5" button-rifled, fluted stainless steel barrel with a 1:7.5 twist rate, G10 composite MK10 series mid-length handguard, low-profile gas block, A2 flash hider installed onto a 9/16-24 RH threaded muzzle (non-optional). Direct impingement operating system. Ships with one 10-round magazine. Weight of upper is approximately 3.4 pounds. Because this is a brand new model, production lead times may initially be several weeks or longer. This unit is 100% complete and is compatible with any standard-specification lower receiver (no modifications required). All NFA rules apply. This product is not currently in production and is only available for pre-order.
$685.00
16" chrome moly, very lightweight barrel with melonite finish and 1:7.5 twist, 9/16-24 muzzle threading (non-optional) with A2 flash hider installed, rifle-length MK10 handguard, and low-profile gas block. Direct impingement operating system. Ships with one 10-round magazine. Weight of upper is 3.7 pounds. This unit is 100% complete and is compatible with any standard-specification lower receiver (no modifications required).
$685.00
Lightweight 16" button-rifled, fluted stainless steel barrel with a 1:7.5 twist rate, G10 composite free-floating handguard, Picatinny railed gas block, A2 flash hider, 9/16-24 threaded muzzle (non-optional), 1:7.5 twist rate. Direct impingement operating system. Ships with one 10-round magazine. Weight of upper is 4.2 pounds. This unit is 100% complete and is compatible with any standard-specification lower receiver (no modifications required).
$680.00
Lightweight 18" button-rifled, fluted stainless steel barrel with 1:7.5 inch twist and composite free-floating rifle-length handguard. 9/16-24 muzzle threading (non-optional) with standard thread protector installed. Direct impingement operating system. Built with refined components featuring either durable materials or improved finishing processes to endure the most extreme conditions. One MK10 3-inch Picatinny rail section is included and installed on the top position of the handguard and one sling swivel stud is installed on the bottom side of the handguard. It is possible to install four MK10 rail sections onto the handguard at the muzzle end in the positions of 3-, 6-, 9-, and 12-o'clock. The upper receiver is produced in standard, durable Kryptek® Highlander camouflage (non-optional). The upper receiver ships with one 10-round magazine. This unit is 100% complete and is compatible with any standard-specification lower receiver (no modifications required).
$1,190.00
Lightweight 18" button-rifled, fluted stainless steel barrel with 1:7.5 inch twist and composite free-floating rifle-length handguard. Features a custom side-charging upper receiver, custom chrome-plated carrier, and custom titanium charging handle. Direct impingement operating system. Built with refined components featuring either durable materials or improved finishing processes to endure the most extreme conditions. Includes fully-functional rear charging handle. 9/16-24 muzzle threading (non-optional) with standard thread protector installed. One MK10 3-inch Picatinny rail section is included and installed on the top position of the handguard and one sling swivel stud is installed on the bottom side of the handguard. It is possible to install four MK10 rail sections onto the handguard at the muzzle end in the positions of 3-, 6-, 9-, and 12-o'clock. The upper receiver is produced in standard, durable Kryptek® Highlander camouflage (non-optional). The upper receiver ships with one 10-round magazine. This unit is 100% complete and is compatible with any standard-specification lower receiver (no modifications required).
$1,360.00
The GDMR model features a precision cut-rifled barrel measuring 20 or 24 inches, and 9/16-24 muzzle threads (non-optional) with standard A2-style flash hider installed. Standard build features our extended-length MK10 handguard, which is made of G10 composite material and vented to aid barrel cooling with the top vents offset from the sight line to minimize mirage. Direct impingement operating system. The handguard features a removable, top-mounted Picatinny rail section measuring 14 inches long, which spans the length of the handguard to achieve a virtually seamless top rail from the back of the receiver to the front of the handguard. Furniture color is olive drab. Both barrel length options feature a 1:8.75 twist. This upper receiver assembly ships with one 10-round magazine. Weight of 20-inch upper is 5.4 pounds. This unit is 100% complete and is compatible with any standard-specification lower receiver (no modifications required).
$1,950.00
Precision cut-rifled, 5S rifling, 1:8.75 fluted, free floated, stainless steel barrel. All barrels are threaded 9/16-24 RH. Direct impingement operating system. Beefy side-charging upper with extra thick walls to minimize flex with long, heavy barrels. The side charger allows a minimum of movement when firing from a concealed position. Standard build features our extended-length MK10 handguard, which is made of G10 composite material and vented to aid barrel cooling with the top vents offset from the sight line to minimize mirage. Ships with one 10-round magazine. Weight of 20-inch upper is 5.9 pounds. This unit is 100% complete and is compatible with any standard-specification lower receiver (no modifications required).
$1,950.00
Complete 6.5 Grendel Entry Upper Receiver Assembly. This unit features a flat top receiver, 20" stainless steel barrel, 1:9 twist, a G10 composite free-floating handguard, low-profile gas block, and A2 flash hider. Direct impingement operating system. Ships with one 10-round magazine. Standard and Shilen barrels are threaded 9/16-24 RH (non-optional). Weight of upper is 6.0 pounds. This unit is 100% complete and is compatible with any standard-specification lower receiver (no modifications required).
$698.00
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Complete upper receiver assembly featuring a flat top upper, stainless steel 20" barrel, 1:9 twist, low-profile gas block, Midwest Industries free-floating four-railed handguard system, and A2 flash hider. Direct impingement operating system. Complete upper ships with one 10-round magazine. Standard and Shilen barrels are threaded 9/16-24 RH (non-optional). Weight of upper is 6.1 pounds. This unit is 100% complete and is compatible with any standard-specification lower receiver (no modifications required).
$875.00
6.5 Grendel Overwatch Complete Upper Assembly. This unit features a flat top upper receiver, 24" stainless steel barrel, 1:9 twist with a G10 composite free-floating handguard, low-profile gas block, and A2 flash hider. Direct impingement operating system. Ships with one 10-round magazine. Standard and Shilen barrels are threaded 9/16-24 RH (non-optional). Weight of upper is 6.5 pounds. This unit is 100% complete and is compatible with any standard-specification lower receiver (no modifications required).
$840.00
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Complete upper receiver featuring flat top upper, 24-inch stainless steel barrel with 1:9 twist, low-profile gas block, Midwest Industries free-floating four-railed handguard system, and A2 flash hider. Direct impingement operating system. Ships with one 10-round magazine. Standard and Shilen barrels are threaded 9/16-24 RH (non-optional). Weight of upper is 6.6 pounds. This unit is 100% complete and is compatible with any standard-specification lower receiver (no modifications required).
$895.00
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