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**JohnKSa** · December 3, 2022, 04:53 PM

Here's a link to a video. At about 1:03, you can see that the inertial sleeve actually appears to move forward during the initial phase of recoil. That is because it stayed still (inertia) while the gun accelerated backwards.

https://www.youtube.com/watch?v=XgMaOdkQCkU

Furthermore, as the recoil continues, you can see that the bolt/inertial sleeve, after the inertia spring is compressed and decompresses, are moving backwards faster than the gun is due to the inertia spring's force.

Here's a closeup showing that at the initial moment of recoil, the inertial sleeve stays still (appears to move forward relative to the rest of the recoiling firearm). This demonstrates that the gun is not momentum operated. The sleeve doesn't recoil with the gun, it stays still initially while the gun recoils. It doesn't move backwards until after the inertia spring decompresses and drives it backwards.

https://www.youtube.com/watch?v=TvgtB2hTWaI

Here's a video from Benelli explaining how the system works.
https://www.youtube.com/watch?v=hLro9wdHq44

The explanation is completely consistent with the description I provided above.

December 3, 2022, 04:53 PM	#50
JohnKSa Staff Join Date: February 12, 2001 Location: DFW Area Posts: 25,062	Here's a link to a video. At about 1:03, you can see that the inertial sleeve actually appears to move forward during the initial phase of recoil. That is because it stayed still (inertia) while the gun accelerated backwards. https://www.youtube.com/watch?v=XgMaOdkQCkU Furthermore, as the recoil continues, you can see that the bolt/inertial sleeve, after the inertia spring is compressed and decompresses, are moving backwards faster than the gun is due to the inertia spring's force. Here's a closeup showing that at the initial moment of recoil, the inertial sleeve stays still (appears to move forward relative to the rest of the recoiling firearm). This demonstrates that the gun is not momentum operated. The sleeve doesn't recoil with the gun, it stays still initially while the gun recoils. It doesn't move backwards until after the inertia spring decompresses and drives it backwards. https://www.youtube.com/watch?v=TvgtB2hTWaI Here's a video from Benelli explaining how the system works. https://www.youtube.com/watch?v=hLro9wdHq44 The explanation is completely consistent with the description I provided above. __________________ Do you know about the TEXAS State Rifle Association?