Cutts comp vs ring sight

[deerslayer]

I had a request to put a comp on an M1 so I decided to create a little experiment to see how much the compensator did to reduce muzzle rise.  Easiest way I thought I could do this was to lay the gun flat and fire it.  The buttstock was positioned against a rubber ended tool handle braced in the bed of my truck.  This would give a repeatable recoil stop.  The toe of the buttstock was positioned against the rubber.  Everything set on a sheet of plywood. I used a wire cutter to release the bolt so there would be no interference by trying to squeeze the trigger.  Slow motion video of the recoil is interesting.  The result, the comp barely makes a difference.  

https://youtube.com/shorts/boEc9fgTsx0?feature=shared

Edited June 6, 2024 by deerslayer

[deerslayer]

The recoil was measured by a line drawn off the gripmount.  

[deerslayer]

The red and green lines show the change in angle.  Two shots were identical, one ring sight shot was a bit more of an angle.  

[68coupe]

I've always thought that most of the recoil was absorbed by the sheer mass of the Thompson. This little experiment of yours pretty much confirms it. The comp does help, but most of the recoil is taken up by the mass. The M2 carbine, on the other hand, has comparably little mass, and substantially more muzzle climb.

Thank you, Karl, 68coupe

[Rabbit57]

Cool experiment, thanks.

 

Mark

[Chip]

That's pretty interesting.  It looks like the bolt contact to the back of the receiver and then again slamming (and bouncing) back into the chamber account for the majority of the movement.

[Merry Ploughboy]

31 minutes ago, Chip said:

That's pretty interesting.  It looks like the bolt contact to the back of the receiver and then again slamming (and bouncing) back into the chamber account for the majority of the movement.

I've noticed that shooters who are new to open bolt guns find that it takes some getting used to.