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For the other AR-15 derivatives in Siege, see 416-C Carbine, C8-SFW, C7E and M4
"An AR-15 converted to a .50 caliber upper reciever. Its high caliber results in effective damage and incredible stopping power."
— In-game description

The AR-15.50 is an assault rifle featured in Tom Clancy's Rainbow Six Siege in the Operation Grim Sky expansion pack. It will be available for use by the Operator Maverick.


The .50 Beowulf calibre used is a proprietary calibre designed by Bill Alexander of Alexander Arms. The round itself is intended to improve stopping power at short-to-medium ranges compared to the standard 5.56×45mm NATO.

In-game, designated as the AR-15.50, this rifle is functionally a marksman rifle, having the ability to kill in two shots at its optimum distance.

Weapon Attachments

Under Barrel


  • The AR-15.50 appears to use quad-stacked magazines. Despite this, it incorrectly holds 10 rounds.
  • In the Main Menu Interface for the Grim Sky season, Maverick is equipped with the AR-15.50, which itself is equipped with a Holographic Sight and a Vertical Grip.