I've read various posts indicating that changing buffer springs can sometimes correct a fail-to-cycle problem.

What are the options for buffer springs, from the "1911" spring fix, to standard buffer springs, and is there any engineering design to use as a reference for testing, or is it totally 'trial and error' ?

Thanks for the help,


-- Capt_C

I used a Wolff extra powered carbine spring and a 9mm buffer in mine. A HSS buffer probably would've been best but this gun is on the cheap. Most of the short gas system uppers come overgassed to begin with by companies that want them to work with a wide range of ammunition and configurations. Add something like a muzzle device adding backpressure and the problem compounds.

It's become increasingly popular to purchase an adjustable gas block and avoiding the spring/buffer game.

ETA:
In general, testing involves using your crappiest, most underpowered ammo and the heaviest spring/buffer combo that works reliably.

Mine was still energetic with the combo above with TulAmmo as well as Independence .223 after dirtied up with about 100 rounds.