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Radial delayed blowback operation uses the rotation of the bolt head to accelerate the bolt carrier. The bolt locking lugs use 120° angles that unlock the bolt as it travels rearward under conventional blowback. As the bolt rotates 22.5˚, it accelerates the bolt carrier to the rear through a 50° cam-pin slot.

Development[]

The system was originally designed for the CMMG Mk45 Guard, in 2015. However, the project started as a failure, but they inspired by the Reising submachine gun. They continue to develop it in 2016 and show it finally in 2017.[1]

Examples[]

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