Product Description The Nordic Components 22RB Complete Upper Receiver converts any standard AR-pattern lower into a dedicated .22LR platform, making it a versatile choice for recreational shooting, training, and hunting. Manufactured using the same high-quality materials found in most standard AR-15 rifles, the 22RB delivers a look and feel virtually identical to a centerfire rifle. Its match-grade 16-inch stainless steel barrel features a 1:16 twist rate and is threaded at 1/2"-28 to accept most popular .22 suppressors, with a machined tenon behind the threads to accommodate O-rings found on certain suppressor models. This complete upper arrives ready to run with a 10-round Black Dog magazine and Black Dog Machine Bolt Saver included. Product Highlights Match-grade 16-inch stainless steel barrel with 1:16 twist rate delivers consistent accuracy with .22LR ammunition Threaded at 1/2"-28 and suppressor-ready with a machined tenon for O-ring-equipped suppressor models Aluminum A3 flat-top upper receiver and slim diameter aluminum handguard provide a lightweight, durable build compatible with standard AR-15 pattern lowers Includes a 10-round Black Dog magazine and Black Dog Machine Bolt Saver to retain the bolt carrier group when the upper is separated from the lower Stainless steel bolt and NC-PCC flash suppressor complete this ready-to-install upper assembly with a matte black finish Specs Brand: Nordic Components MPN: 22RB-UPPER-16-KIT UPC: 816696020549 Caliber: .22 Long Rifle (.22LR) Barrel Length: 16 inches Barrel Material: Stainless Steel Barrel Finish: Stainless Steel Twist Rate: 1:16 inches Barrel Threads: 1/2"-28 Upper Receiver Type: A3 Flat-Top Handguard: Aluminum Slim Diameter Muzzle Device: NC-PCC Flash Suppressor Bolt: Stainless Steel Finish: Matte Black Material: Aluminum, Stainless Steel Magazine Included: Yes (10-round Black Dog) Compatible With: AR-15 Pattern Lowers / All Black Dog AR-15 .22 Magazines Country of Origin: United States of America Disclaimer: We strive to provide accurate and up-to-date product descriptions, specifications, and images; however, errors or omissions may occasionally occur. We are not responsible for any inaccuracies or discrepancies in the content provided. If you notice anything incorrect or unclear, please contact us so we can correct it. When in doubt, we recommend verifying details directly with the product&';s manufacturer.