Inception Designs Master Spring Set - Autococker Lowertube Kit Body has had both frame

Body has had both frame screws helicoiled

consistency and efficiency whilst keeping blowback to a minimum

Valve springs are 1-1/4" in length

The original low pressure valve

It is also turned and milled with slots to reduce weight and friction in the bolt bore

Inception Designs Master Spring Set - Autococker Lowertube Kit Body has had both frameMain Spring Set, Trigger Return Spring Set, Sear Spring Set, and Valve Spring SetSpring force can be easily seen from the number of coils on the spring. Less coils is stronger, more coils is weaker)We recommend using Main Spring B or C initially (B will give higher velocity)We recommend using Trigger return spring B initially (C requires a very well tuned gun and frame or will not work)We recommend sear spring C (Light Medium) but if the hammer skips