CMMG AR-15 Sierra A3 Flat-Top Upper Assembly 22 Long Rifle 1 in 16" Twist 16" Barrel WASP Melonite Finished Chrome Moly Matte with M4 Handguard, Flash Hider Pre-Ban
- Black Dog Machine Conversion Magazine Easy Loader for Black... $9.99 Available
- Taccom Pressure Plug AR-15 22 Long Rifle Conversion... $7.25 Available
- Black Dog Machine Conversion Magazine AR-15 CMMG, Ciener,... $59.99 Available
- Taccom Enhanced 22 Long Rifle AR-15 Conversion Kit Firing Pin... $12.95 Available
- Black Dog Machine X Form Conversion Magazine with Steel Feed... $21.49 Available
- Black Dog Machine X Form Conversion Magazine with Steel Feed... $19.99 Select Options
- CMMG Lower Receiver Parts Kit AR-15... $58.99 Available
- KNS Hammer and Trigger Pin 2nd Generation, 2nd Modification... $30.49 Out of Stock, Backorder OK
- Black Dog Machine Conversion Magazine AR-15 Olympic Rimfire... $25.99 Available
- Uncle Mike's Sling Swivel Stud 115 RGS Set... $2.59 Available
- HK Magazine Floorplate HK Extended USP 45 ACP 12-Round Blue... $5.99 Out of Stock, Backorder OK
- Ruger Stock Reinforcement Screw Ruger Mini-14, Mini-30... $1.99 Select Options
- ProMag Conversion Magazine AR-15 CMMG, Ciener, Tactical... $15.29 Select Options
- SOG Key Folding Knife 1.5" Drop Point 5Cr13MoV Stainless Steel... $8.99 Select Options
- Adams Arms AR-15 Pistol A3 PDW Tactical Evo Gas Piston Upper... $885.37 Available
- Ruger Stock Reinforcement Ruger Mini-14 Stainless, Wood stock... $14.99 Available
CMMG's Sierra rimfire uppers feature many significant improvements over previous designs, enhancing functionality, reliability, and ease of use. Prominent among these improvements are an Anti-Jam Charging Handle, Live Round Extraction ability, and Gas Deflector. CMMG's durable Weapons Armament Surface Protection (WASP) Melonite treatment has been applied to the barrel and surface-hardens the steel, extending barrel service life by reducing friction in the bore and lessening bore surface wear.
The Sierra upper is ready to drop on to any standard mil-spec lower receiver, all that's needed are a compatible magazine and a pile of 22 LR ammunition to start enjoying some inexpensive and fun time at the range! Compatible with Black Dog Machine and CMMG rimfire AR-15 magazines (not included). CMMG recommends the use of Plated 40 grain High Velocity 22 LR ammunition for optimal functioning.
- Upper Receiver: A3 Flat-Top w/Ceramic Finish
- Barrel Length: 16"
- Barrel Contour: M4
- Barrel Material: Chrome Moly Steel
- Muzzle Thread Pattern: 1/2"-28
- Chrome Lined: No
- Barrel Finish: WASP Melonite
- Twist Rate: 1 in 16"
- Chamber: 22 Long Rifle
- Muzzle Device: A1 Flash Hider
- Gas System Length: None, Blowback
- Gas Block Diameter: 0.750"
- Handguard: Polymer M4-Style
- Sights: None, Single Rail Gas Block/Front Sight Base
- Extras: Gas Deflector, Anti-Jam Charging Handle, Non-Functional Forward Assist Plug, Live Round Extraction
- Magazine Not Included, Compatible w/Black Dog Machine & CMMG Magazines
Please Note: Installation of AR-15 upper assemblies with certain features including, but not limited to: flash hiders, bayonet lugs, and threaded muzzles may violate state and/or local laws.
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