Steel Tokyo Marui Saiga 12K Outer Barrel -Regular strength spring is 4

-Regular strength spring is 4 pounds and 8 ounces at 8 inches of travel which is just about identical to the stock Vipertech buffer spring

This will improve precision

Relief cuts have been made to allow the magazine to sit more flush when magazine is inserted

this is only the part of the piston that is threaded 14mm- on each end

When you screw the magazine button in be aware that depending on which way the catch is inserted to the lower will effect the magazine catch protruding

Steel Tokyo Marui Saiga 12K Outer Barrel -Regular strength spring is 4Make your Saiga feel more sturdy and realistic with a steel outer barrel. 4140 Steel. Black nitride for scratch resistance. Compatible with the stock muzzle cap.