Sigarms Sig SG 550 SP, SG 551 SP Instructions Manual
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Page 51
![Page 51
The bolt assembly moves back along the rails in the receiver [16] as
far as the stop [17] whereby:](http://img.usermanuals.tech/thumb/5850/93802/w300_sig_550_551_d-50.png "Page 51
The bolt assembly moves back along the rails in the receiver [16] as
far as the stop [17] whereby:")
The bolt assembly moves back along the rails in the receiver [16] as far as the stop [17] whereby:
Page 52
![Page 52
5.1.4. Bolt advance
The force of the compressed recoil spring [2] thrusts the bolt forward.
The bolt head [5] feeds the next round from the magazine [20] into
the chamber.
Bolt advance
52](http://img.usermanuals.tech/thumb/5850/93802/w300_sig_550_551_d-51.png "Page 52
5.1.4. Bolt advance
The force of the compressed recoil spring [2] thrusts the bolt forward.
The bolt head [5] feeds the next round from the magazine [20] into
the chamber.
Bolt advance
52")
5.1.4. Bolt advance The force of the compressed recoil spring [2] thrusts the bolt forward. The bolt head [5] feeds the next round from the magazine [20] into the chamber. Bolt advance 52
Page 53
![Page 53
In the final stage of the advance, the bolt head [5] locks up and the
release bar [6] is depressed. The weapon is ready to be fired.
Locking
53](http://img.usermanuals.tech/thumb/5850/93802/w300_sig_550_551_d-52.png "Page 53
In the final stage of the advance, the bolt head [5] locks up and the
release bar [6] is depressed. The weapon is ready to be fired.
Locking
53")
In the final stage of the advance, the bolt head [5] locks up and the release bar [6] is depressed. The weapon is ready to be fired. Locking 53
Page 54
6. Appendix 6.1. list of parts 100 receiver 111. Receiver casing 141. Bolt cover 142. Rivet 151. Rear sight drum 152. Drum spring 153. Drum stud 154. Luminous ampoule* 155. Insert 156. Rubber disc 161. Pivot 162. Drum axle 163. Spring washer 164. Safety washer 165. Leaf spring 171. Windage correction screw 172. Click stud 173. Rear sight spring 174. Limitation spring 175. Spring pin 181. Elevation correction screw 200 Barrel / gas system 211. Barrel* 212. Front sight...
Page 55
500 Trigger assembly 501. Trigger casing 521. Magazine catch 522. Magazine catch spring 523. Magazine catch pin 524. Bush 541. Pistol grip 542. Floorplate 543. Allen screw 544. Stop nut 545. Nameplate 551. Pressure point screw 552. Stop nut 553. Pressure point spring 554. Trigger guard 555. Trigger guard bearing 561. Hammer 562. Hammer axle 563. Main spring 564. Bolt catch 565. Bolt catch spring 566. Spring bolt 571. Safety lever 572. Safety shaft 573. Locking spring 576....
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