12-31-2023, 11:25 AM
KC,
Are you sure that flat spring can't be worked with a bit of effort to where it sits properly against the lip of the buffer? A spiral spring should be able to expand laterally as well as longitudinally. It should sit up against the lip, not the collar. The collar is designed to center the buffer and remove lateral slack.
Finding the best spring and buffer system for the length of barrel, gas system length and gas port diameter is usually done for you at the factory. As soon as you start swapping out for after market or building your own you run the risk of engineering an inefficient system. Best to get the heaviest buffer that will lock back on last round. Heaviest buffer will make for smoother cycling, especially with short barrels where early unlocking is common. The heavier the buffer the more it delays unlocking. Rather than faff around with springs and buffers you could get an adjustable gas block or adjustable carrier. Put your heaviest buffer in and slowly open up the gas until it locks back on last round. A little further for reliability and don't change it unless using a suppressor or different ammo.
Are you sure that flat spring can't be worked with a bit of effort to where it sits properly against the lip of the buffer? A spiral spring should be able to expand laterally as well as longitudinally. It should sit up against the lip, not the collar. The collar is designed to center the buffer and remove lateral slack.
Finding the best spring and buffer system for the length of barrel, gas system length and gas port diameter is usually done for you at the factory. As soon as you start swapping out for after market or building your own you run the risk of engineering an inefficient system. Best to get the heaviest buffer that will lock back on last round. Heaviest buffer will make for smoother cycling, especially with short barrels where early unlocking is common. The heavier the buffer the more it delays unlocking. Rather than faff around with springs and buffers you could get an adjustable gas block or adjustable carrier. Put your heaviest buffer in and slowly open up the gas until it locks back on last round. A little further for reliability and don't change it unless using a suppressor or different ammo.