Tl; dr - It works across the board in any chambering afaik, delayed recoil operation is delayed recoil operation. MP5 is still GOATed if dummy expensive to make in comparison.
The hyper-nuance is that it ‘feels’ better than most other operating methods (especially for pistol caliber SMGs) due to it not having a ‘sharp’ thrust to the start of recoil like most gas or recoil operated systems do. Roller delayed brings a kinda double pulse THEN the main recoil from the bolt mass reciprocation. Most other system give a sharper hit first instead.
In its time (1950s) that was pretty slick, the viable competition was long stroke or short stroke piston gas guns in their infancy. Again, hyper-nuance here but the gas port and big boi off axis reciprocating mass robs accuracy. It lowkey sucks in anything outside of a pistol or intermediate rifle cartridge compared to a short stroke piston system. That big ol’ bolt has some stout slap to it at the end and reset of travel.
Tl; dr - It works across the board in any chambering afaik, delayed recoil operation is delayed recoil operation. MP5 is still GOATed if dummy expensive to make in comparison.
The hyper-nuance is that it ‘feels’ better than most other operating methods (especially for pistol caliber SMGs) due to it not having a ‘sharp’ thrust to the start of recoil like most gas or recoil operated systems do. Roller delayed brings a kinda double pulse THEN the main recoil from the bolt mass reciprocation. Most other system give a sharper hit first instead.
In its time (1950s) that was pretty slick, the viable competition was long stroke or short stroke piston gas guns in their infancy. Again, hyper-nuance here but the gas port and big boi off axis reciprocating mass robs accuracy. It lowkey sucks in anything outside of a pistol or intermediate rifle cartridge compared to a short stroke piston system. That big ol’ bolt has some stout slap to it at the end and reset of travel.