Uppers
All upper receivers not chambered in 5.56x45 or .223 Remington come with one (1) caliber specific magazine. Capacity may vary depending on your State's laws.
When ordering an upper reciever unit please keep the following in mind: All complete uppers sold on-line come fully assembled, headspaced and test-fired. While each upper is made to mil-spec standards for dimensions and tolerances, uppers may fit differently on various lowers. Some may fit tighter than other, some may fit looser. Some may require minor fitting based on tolerance stacking. Each upper comes with a lifetime warranty and a 60 Day Satisfaction Guaranty. Please see our Warranty page for details.
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16" 7.62 x 39mm Upper Receiver
Complete upper receiver assembly manufactured for 7.62 x 39mm and includes one magazine.
K30R-UR$588.90 -
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16" K3B-M4 Upper Receiver
Features an M4 contoured barrel and M4 handguards. Available in 5.56 NATO
K3B-M4UR$588.90
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16" M4 Tactical Carbine Upper Receiver
Sometimes called the "alphabet gun". The A3-TC variant takes the K3B-M4 and adds a detachable c...
K3B-M4-A3-TC-UR$796.90 -
16in. LT M4 Upper Receiver
The LT model has a M4 style barrel. Other options are also included standard. Available in 5.56...
LTM4UR$696.80 -
16in. LTF Upper Receiver
The LTF model has fluting along the full length of the barrel increasing heat dissipation. Othe...
LTF UR$743.60
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24" .223 WSSM Upper Conversion Unit
Upper conversion unit for your complete AR-15 lower receiver designed for .223 Winchester Super...
K8MAGUR223$895.70 -
GSG2-556UR-Sale: Gamestalker Upper Receiver
GSG2 5.56 Closeout Gamestalker Upper Receiver, Black/SS
GSG2-556UR$675.00 -
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K10UR 10mm Upper Receiver, 16" bbl.
Complete upper receiver assembly manufactured in 10 mm caliber. Includes one 18 round polymer m...
k10ur$721.50 -
K10UR-FT: 16" 10mm Flat-top Upper
Complete upper receiver assembly chambered in the wildly popular and affordable 10mm pistol car...
K10ur-FT$721.50
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K10UR-OR: 10mm Optics Ready Upper Receiver, 16"
K10UR-OR Optics Ready
k10ur-or$767.00 As low as: $747.00 -
K16-204UR: 16in. .204 Ruger® K16 Style Upper Receiver
16" Bull barreled match grade .204 Ruger® target/hunting upper. Great for an Olympic Arms or ...
K16-204UR$591.50 -
K16-300UR: 16in. 300 Blackout K16 Style Upper Receiver
16" Bull barreled match grade 300 Blackout target/hunting upper. Great for an Olympic Arms or a...
K16-300UR$591.50