BG Complete 16" .22LR Pencil Upper Receiver | A2 | 12" M-LOK Slant Cut | A2 Flash | With BCG & CH

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Product Code: BG1622LR12SL-BLK
List Price: $474.95
MSRP: $474.95
Sale Price: Sale Price: $315.95
Savings: $159.00
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Builder's Grade Complete 16" .22LR Lightweight Pencil Upper Receiver | A2 | 12" M-LOK Slant Cut | With Bolt Carrier Group and Charging Handle

This lightweight .22 Rimfire Complete Upper Receiver comes with our precision 16 inch pencil barrel and a 12 inch Free-Float MLOK rail, with the flash hider extending past the handguard. The bolt is made of all stainless steel construction and we use an anti-jamb dedicated 22 charging handle.

Our .22 LR upper receivers are fully compatible with CMMG or similar 22 components. Our barrels and bolts are fully interchangeable and follow the same pattern as CMMG.

Compatible with RTB/CMMG .22 magazines, which you can find here

Caliber 22LR
Length 16"
Material 4150 Chrome Moly Vanadium
Profile Lightweight Pencil
Finish SBN
Dimpled? No
Twist Rate 1:16
Muzzle Thread 1/2x28 TPI
Weight 23.2oz

Bolt Carrier Group:

  • Stainless Steel Construction
  • Designed to work with all CMMG and RTB .22LR barrels
  • long lasting and reliable

Upper Receiver:

  • Machined from a Mil-Spec 7075 T6 forging Hard Coat Anodized per Mil-A-8625F, Type III
  • M4 Feed ramps
  • Made in the U.S.A.


  • 12" free float handguard
  • MIL-STD 1913 Picatinny rail on top
  • 4 M-Lok slots on 3 sides
  • Precision Machined 6000 Series aluminum, for high strength and weight savings
  • Clamp on system for easy assembly
  • Steel Barrel nut to resist movement under heat
  • Made in USA

Charging Handle:

  • Durable polymer construction with a filled-in, reinforced channel
  • .22 ARC Mil-Spec style
  • Anti-Jam Charging Handle Assembly

Please Note:

Uppers may present light fouling from our quality control process and/or test firing
 All semi-auto rimfire firearms operate best with quality copper plated and full powered or high velocity 22lr ammunition.

Although .22lr AR builds do not utilize the functionality of a buffer or buffer spring, we still recommend using both to provide a stopping point/wall that prevents the 22 bolt carrier from moving rearward. Using a buffer and buffer spring will prevent light primer strikes. This is true for all Ciener/Atchisson 22 pattern platforms.