SIG SAUER SWISS ARMS SG552 - Manual (Page 20)

11. Fitting trigger housing:
- Cover bore of front trigger housing bolt.
- Depress trigger housing bolt to stop.
- Press recoil spring with spring guide in the receiver
casing, raise trigger housing and secure with rear trig-
ger housing bolt.
12. Verify functions in accordance with section 3.16.
39
Handling
5. Install upper handguard.
6. Install lower handguard.
7. Assemble bolt
8. Insert bolt:
• Press on the firing pin to push the bolt head
completely forward.
• Insert bolt into the receiver housing, ensuring
that the gas piston passes through the hole in
the receiver housing.
9. Insert cocking handle into its slot in the bolt carrier
and check that the catch has registered.
10. Insert recoil spring guide and recoil spring into the
rear of the receiver.
Handling
38
illu. 52) Insert bolt assembly illu. 53) Inserting recoil spring and guide illu. 54) Installing trigger housing illu. 55) Installing recoil spring