Answer
Apr 05, 2026 - 12:03 PM
The kit includes a Delrin spacer and an M5x0.8mm nut. The Delrin spacer is pressed into the front of the a&k sr25 engine’s cylinder, while the nut is installed in the rear of the lower receiver for the stock’s bolt. Having all necessary parts in one kit saves time and ensures compatibility for those upgrading or maintaining their airsoft rifles.
