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Barrel Collar Pin, Used Factory OriginalFirearm Mfgr: MARLIN / GLENFIELDFirearm Model: 50 BOLT ACTION, 512, 55, 5510Product #: 1594700A$3.96
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Barrel Collar, 10 Ga., w/ Sight Notch, Used Factory OriginalFirearm Mfgr: MARLIN / GLENFIELDFirearm Model: 5510Product #: 421740$28.94
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Barrel Collar, 10 Ga., w/o Sight Notch, Used Factory OriginalFirearm Mfgr: MARLIN / GLENFIELDFirearm Model: 5510Product #: 2023770$28.94
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Barrel Collar, 12 Ga.Firearm Mfgr: MARLIN / GLENFIELDFirearm Model: 50, 512, 5510, 55Product #: 420150A$28.94
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Barrel Collar, 20 Ga.Firearm Mfgr: MARLIN / GLENFIELDFirearm Model: 50, 512, 5510, 55Product #: 1557760A$28.94
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Barrel, 10 Ga., 34", Blued, New Orig (Not Pre-Drilled & Tapped For Front Sight)Firearm Mfgr: MARLIN / GLENFIELDFirearm Model: 5510Product #: 454690$203.52Extra shipping cost of $5.00
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Breech Bolt Assembly Pin, 10 Ga.Firearm Mfgr: MARLIN / GLENFIELDFirearm Model: 5510Product #: 421950$4.82
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Breech Bolt Handle, 10 & 12 Ga.Firearm Mfgr: MARLIN / GLENFIELDFirearm Model: 50, 512, 55, 5510Product #: 420320A$36.56
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Breech Bolt, 12 Ga., RearFirearm Mfgr: MARLIN / GLENFIELDFirearm Model: 50, 55, 512, 5510Product #: 420330A$21.02
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Ejector, New Factory OriginalFirearm Mfgr: MARLIN / GLENFIELDFirearm Model: 50, 55, 512, 5510Product #: 422570A$7.74
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Extractor, 10 & 12 Ga., NewFirearm Mfgr: MARLIN / GLENFIELDFirearm Model: 512, 55, 5510, 50 BOLT ACTIONProduct #: 420440A$17.07
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Firing Pin Spring Guide, 10 Ga.Firearm Mfgr: MARLIN / GLENFIELDFirearm Model: 5510Product #: 421970$11.89

Parts List
NINot Illustrated
0Schematic w/ Parts List
1Barrel
2Barrel Collar
3Barrel Collar Pin
4Barrel Washer
5 / 7Breech Bolt
6Breech Bolt Handle
8Breech Bolt Assembly Pin
9Bullseye
11Ejector
12Extractor
13Firing Pin
14Firing Pin Spring
15Firing Pin Spring Guide
19Magazine
20Magazine Catch
21Magazine Catch Pin
22Rear Sight & Scope Base
23Rear Sight Assembly
24Rear Sight Base
25Rear Sight Elevator
26Rear Sight Folding Leaf
28Recoil Pad
29Recoil Pad Screw
30Recoil Pad Spacer
31Safety Blade
32Safety Blade Spacer
33Safety Lever
34Safety Pin
35Sear
36Sear Pin
37Sear & Trigger Spring
38Stock
40Swivel Screw
41Takedown Screw
42Trigger
43Trigger Pin
46Trigger Guard Screw, Rear
47Swivel
48Swivel Stud
50Magazine Guard Plate
51Trigger Guard
52O Ring
53Magazine Spacer