SIG SAUER SIG 551-A1 Rifle - Manual (Page 92)

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Upper Receiver Group
111 Receiver assembly
112 Accessory rail
113 Accessory rail fastener
114 Bolt cover
115 Bolt cover Rivet
211 Barrel
212 Flash suppressor
213 Crush washer
214 Gas block
215 Roll pin 4x28mm
216 Stop pin
217 Compression spring
218 Roll pin 2x6mm
219 Gas valve
220 Gas tube
221 Operating rod
222 Recoil spring
223 Spring pin 2.5x12mm
224 Support washer
225 Dovetail block
311 Upper handguard
312 Lower handguard 400 Bolt Group
411 Bolt head
412 Firing pin
413 Firing pin stud
414 Firing pin spring
415 Extractor
416 Extractor spring
417 Pin
418 Bolt carrier
419 Charging handle catch
420 Charging handle catch
pin
421 Charging handle catch
spring
422 Charging handle
Lower Receiver Group
1 Trigger casing, semi
hinged
2 Hammer pivot pin
3 Hammer spring
4 Trigger pivot pin
5 Trigger bushing
6 Trigger assembly
7 Trigger spring
8 Sear
9 Safety shaft
10 Safety detent spring
11 Safety lever
12 Slotted spring pin
13 Buffer plate
14 Trigger casing plug
15 Mag catch assembly
16 Mag catch button
17 Mag catch spring
18 Bolt catch pin
19 Bolt catch spring
20 Pressure point screw
21 Bushing, pressure point
screw
22 Front take down pin
23 Rear take down pin
24 Take down pin plunger
25 Take down plunger
spring
26 Trigger guard assembly 27 Slotted spring pin
28 Pistol grip assembly
29 Buttstock, adj/fld
30 Stock latch
31 Stock latch pin
32 Hinge disc spring
33 Stop nut
34 Hinge pin
35 Sear spring
36 Pistol grip nut
37 Hammer, auto
38 Pistol grip bolt
39 Bolt catch
40 Sear spacer
41 Latch spring
42 Pressure point spring
Magazine Group
701 Magazine, 30 rd
10.1 SIG551-A1 Parts List
12SIG541_SIG551_A1MiniManual_Rev1.indd 92 2/17/12 2:48 PM