Comments by "" (@neutronalchemist3241) on "Ross Rudd's Prototype Delayed Blowback AR180" video.

  1. Like a lever-delayed blowback, it works by accelerating the bolt carrier in respect to the bolt face (with an additional resistance given by the friction of the block over the inclined surface). In this case the bolt carrier is accelerated at about double the rate of the bolt face. To accelerate a mass at double the speed in the same time you need four time the energy, so the system allows to reduce the weight of the bolt carrier to 1/4 of what woud have been needed in a pure blowback design
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  2. It's considered a lever delayed blowback. The acceleration of the bolt carrier in respect of the bolt face can be obtained via a lever or inclined surfaces.
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  3. It's considered lever delayed. Lever delay (the acceleration of the bolt carrier) can be obtained via a lever or via inclined surfaces (like in this case).
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