Armalite Dedicated .22lr AR-15 Upper Recievers $350

[imschur]

Check them out here.

Model: U22LRLB

Caliber: .22 Long Rifle

Barrel: M4 with .203 Step Down

Rifling Twist: 1:16 RH

Muzzle Device: A2 Flash Suppressor

Front Sight Base: Gas Block with Picatinny Rail is .293 (+/-) lower than top of upper receiver

Rear Sight: None

Upper Receiver: Forged Flattop with Picatinny Rail & Laser Engraved Rail Numbering, 7075-T6 Aluminum

Bolt: CMMG

Extractor: Fixed

Finish: Anodized Aluminum Upper Receiver, Manganese Black Nitride Steel Barrel

Accuracy: 2" at 50 yards

[98Z5V]

I see no gas tube, and it looks like a dedicated collar on the end of the barrel - very nice.  <thumbsup>

[Retired JM]

Since there's no gas tube, I'm a-guessing that it's a gas blowback operated upper. Armalite has no info on their website in re the operating system, but the BCG is a CMMG unit and CMMG's own 22 upper is a blowback-type unit.

[98Z5V]

Roger - it's truly a dedicated .22 upper, instead of them just sticking an adapter in the AR-15 upper - no gas tube to become fouled and have to clean lead deposits out of.  <thumbsup>

The dedicated collar on the end of the barrel feeds much better than the older style, with the .223-casing-looking adapter on the front of the .22 "BCG."  Awesome stuff.