SIG SAUER SIG522 Recoil Spring Upgrade - Manual (Page 2)

18 Industrial Drive, Exeter, NH 03833 • (603) 772-2302 • www.sigsauer.com
P/N 1520169
1
2
3
4
5
BUFFER
EXTERNAL RETAINING RING
6
RECOIL SPRING WASHER
RECOIL ROD ASSY
6 1520091 BOLT 1
5 1520036 1
4 1520032 1
3 1520039 RECOIL SPRING 1
2 1520035 1
1 1520159 1
ITEM
NO.
PART
NUMBER
DESCRIPTION QTY.
TITLE:
18 Industrial Drive Exeter, NH 03833
RECOIL ASSEMBLY
2. Secure the bolt in a padded vise with the firing pin hole facing downward.
3. Slide the guide rod up through the hole in the bolt.
4. Slide the recoil spring washer (#2) over the guide rod.
1
2
3
4
5
BUFFER
EXTERNAL RETAINING RING
RECOIL SPRING WASHER
5 1520036 1
4 1520032 1
3 1520039 RECOIL SPRING 1
2 1520035 1
1 1520159 RECOIL GUIDE ROD ASSEMBLY 1
ITEM
NO.
PART
NUMBER
DESCRIPTION QTY.
TITLE:
18 Industrial Drive Exeter, NH 03833
RECOIL ASSEMBLY
5. Slide the recoil spring (#3) over the guide rod (#1).
6. Grasp the recoil guide rod and spring assembly and insert it into the deeper hole of the buffer (#4).
7. Push it through until the end of the recoil guide rod is exposed (you should see the groove for the external
retaining ring (#5) once you push the rod through the buffer #4).
8. Snap the external retaining ring onto the recoil guide rod ensuring it is completely into the groove of the guide rod.
9. Apply a light coat of lubricant to the recoil spring at this time.
Installing the Upgrade Kit into the Rifle
1. Slide the bolt assembly back into the upper receiver.
2. Align the charging handle slot of the bolt with the slot in the upper receiver.
3. Slide the handle back into the bolt ensuring it is completely into the bolt.
4. Slide the bolt forward and guide the buffer into the rear of the upper receiver.
5. To close the receivers, apply slight pressure to the buffer and close the receivers together.
NOTE: When you press the buffer slightly forward the external retaining ring should NOT be making
contact against the buffer.
6. Press the takedown pin from right to left until it stops.
7. Check bolt travel for smooth movement.
FOR PRODUCT SERVICE OR QUESTIONS PERTAINING TO THESE INSTRUCTIONS PLEASE CALL SIG SAUER
(603) 772-2302