Exploded view / parts list
Parts list
100 receiver
111. Receiver casing
141. Bolt cover
142. Rivet
151. Rear sight drum
152. Drum spring
153. Drum stud
154. Luminous ampule*
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 mount*
213. Roll pin
214. Spring ring**
221. Bayonet lug**
222. Spring pin
223. Stop pin
224. Compression spring
225. Spring pin
231. Front sight
232. Night front sight
233. Positioning bolt
234. Night front sight spring
235. Spring pin
236. Front sight screw
237. Front sight disc
238. Spring pin
241. Gas valve
251. Gas tube
261. Gas piston
262. Recoil spring
263. Spring pin
264. Spring pin
265. Spacer
268. Support washer
300 Handguard
311. Upper handguard
321. Lower handguard
330. Bipod complete**
331. Leg left**
332. Leg right**
333. Bipod carrier**
334. Stud**
335. Circlip**
336. Click stud**
337. Bipod spring**
400 Bolt
411. Bolt head
412. Firing pin
413. Firing pin stud
414. Firing pin spring
415. Extractor
416. Extractor spring
417. Pin
421. Bolt carrier
422. Bolt handle catch
423. Axel of bolt handle catch
424. Spring of bolt handle catch
425. Bolt handle
* Can not be ordered as individual parts
**Not on SG 551
500 Trigger assembly
501. Trigger casing
510. 3-round burst facility
511. Template
512. Chargeover
513. Pawl
514. Pawl spring
515. Bush
516. Segment
517. Segment axle
518. Segment spring
519. Locking washer
520. Compression spring
521. Magazine catch
522. Magazine catch spring
523. Magazine catch pin
524. Bush
531. Release bar
532. Circlip
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
575. Automatic firing lock axle
576. Spring pin
578. Stop ring
581. Trigger
582. Trigger spring
583. Trigger rod
584. Pivot trigger
585. Trigger bush
586. Trigger rod spring
587. Sear*
588. Automatic fire pawl
589. Automatic fire pawl spring
591. Trigger casing stud
592. Spring –pressure pin
593. Spring for trigger casing stud
594. Spring pin
595. Pin
596. Cup spring
597. Baffle plate
598. Sear bolt*
599. Sear roller*
600 Butt
611. Buttstock
612. Butt catch
613. Butt catch spring
614. Clip
615. Spring pin
616. Butt
700 Magazine
711. Magazine casing
712. Magazine floorplate
713. Floorplate catch
714. Feeder
715. Magazine spring