Description

SS 1:5 twist with 5/8×24 threads
No jet used. REquires scar 16/17 knob and piston.
Knob and piston not included.
ammo tested fiocchi 125 SST
This ammo functioned perfectly without a can and without cutting the spring.
Different cans have different backpressures so various ammos will cycle differently.
Freedom munitions 125, 155 and 175 grain ammos cycle without issue.