AR-15 Uppers

All 300 AAC upper receiver assemblies are sold as fully-complete, function-tested, and ready-to-fire products

All uppers and rifles are built to order and have an estimated lead time of 4-6 weeks.
Introducing the Alexander Arms 300 Blackout Upper Kit! This kit has everything you need to get started on your very own 300 upper build!

The kit includes:

- Mil-Spec flat top upper receiver (port door and forward assist installed)
- Our very own high quality 16", 416 stainless steel, 1:8 twist, fluted barrel. Muzzle threading is 5/8-24 TPI RH.
- Your choice of either a Low Profile or Picatinny Railed Gas Block
- Carbine-length Gas tube
- Mil-Spec charging handle

The kit does not include a bolt, bolt carrier, barrel nut, or handguard.

All uppers and rifles are built to order and have an estimated lead time of 4-6 weeks.
$525.00
Features:

- Lightweight 11.5" button-rifled, stainless steel barrel
- 1:7 twist rate
- MK10 series carbine handguard
- Low-profile gas block
- 5/8-24 RH threaded muzzle (non-optional)
- No muzzle device is pre-installed
- Direct impingement operating system
-
Ships with one 30-round magazine (Unless restricted by your state in which no magazine will be shipped)
- Weight of upper is approximately 3.4 pounds.

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

All NFA rules apply


PICTURE MAY NOT REFLECT ACTUAL PRODUCT

All uppers and rifles are built to order and have an estimated lead time of 4-6 weeks.
$755.21
High-quality and precisely designed, built, tuned, and tested by the professionals at Alexander Arms® using only the best components we can manufacture

Features:

- Picatinny flat-top railed receiver
- Carbine-length gas system
- G10 composite carbine-length handguard
- Picatinny railed gas block
- Military-style trigger
- 16-inch, tightly-dimensioned, 416 stainless steel, 1:8 twist, fluted barrel
- Muzzle threading is 5/8-24 TPI RH
- Direct impingement operating system
-
Upper receiver features extended feed ramps
- Stock extension tubes and carrier gas keys are properly staked
- This weapon will fire both supersonic and subsonic ammunition
- Weight of upper is 4.15 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.
$755.21
This upper features:

- Flat-top receiver
-
16" stainless steel barrel
- 1:7 twist
- Threaded 5/8-24 TPI RH
- Manticore Arms Transformer Rail handguard
- Your choice of two sets of panels
- Cerakote finish of your choice (Options Available Below)
- One 30 round 5.56 NATO magazine (Unless restricted in your state in which no magazine will be shipped)
- Weight of upper is 3.9 lbs

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.
$1,249.50