Builder's Grade Complete 16" .22LR Lightweight Pencil Upper Receiver | A2 | 15" BX Series M-LOK Handguard | with Bolt Carrier Group and Charging Handle
This lightweight .22 Rimfire Complete Upper Receiver comes with our precision 16-inch pencil barrel and a 15-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-jam 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
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Barrel
|
Specifications
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|---|---|
| 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.
Handguard:
- 15" free float handguard
- MIL-STD 1913 Picatinny rail on top
- 8 M-Lok slots on 3 sides
- Precision Machined 6000 Series aluminum, for high strength and weight savings
- Hard Coat Anodized per Mil-A-8625F, Type III, Class 2
- Clamp on system for easy assembly
- Steel Barrel nut to resist movement under heat
- 14.5 oz with barrel nut and hardware
- 1.35" Inside Diameter
- 1.63" Wide
- Made in USA
Charging Handle:
- Durable polymer construction with a filled-in, reinforced channel
- .22 ARC Mil-Spec style
- Anti-Jam Charging Handle Assembly
AMMO RECOMMENDATION: For in-house testing, we utilize CCI .22LR Mini-Mag 36 Grain Copper-Plated Hollow Point Varmint Ammo (1,260 FPS). We highly recommend this ammunition for use with all RTB .22 uppers. It is important to note that the use of underpowered or economy-grade ammunition may lead to less-than-optimal performance outcomes.
Please Note:
Uppers may present light fouling from our quality control process and/or test firing
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.
