8/14/2019 AR15 Pin and Spring Sizes

1/2

olt AR-15 Pin Sizes

AR-15/M-16 Pin and Spring SizesThe Following Sizes Represent MILSPEC.

Variances may be encountered based on non-MILSPEC sources.

Pins

Description Qty OAL Large EndSmall

End Misc.1 Sight Drum Roll Pin 1 0.250 0.0622 Windage Drum Roll Pin 1 0.375 0.062olt Cam Pin 1 0.800 0.312olt Catch Roll Pin 1 0.437 0.093olt Ejector Roll Pin 1 0.437 0.062olt Extractor Pin 1 0.446 0.099ection Port Hinge Pin 1 3.850 0.125evation Housing Retaining Pin 1 0.625 0.093

orward Assist Pawl Roll Pin 1 0.250 0.062orward Assist Retaining Roll Pin 1 0.625 0.093ring Pin 1 3.280 0.155 0.104 .054 (Tip)ring Pin Retaining Pin 1 0.820 0.096ont Sight Taper Pins 2 0.850 0.143 0.124

ont Takedown Pin 1 1.310 0.248as Tube Roll Pin 1 0.312 0.081ear Takedown Pin 1 1.010 0.248elector Detent Pin 1 0.395 0.141 0.124ear Pin 1 0.905 0.125akedown Detent Pins 2 0.328 0.091rigger & Hammer Pins 2 0.905 0.155rigger Guard Roll Pin 1 0.625 0.093

Springs

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8/14/2019 AR15 Pin and Spring Sizes

2/2

olt AR-15 Pin Sizes

escription Quantity OAL OutsideDimensionNumber of

Coils1 Sight Detent Spring 1 .50 .118 132 Elev. Housing Spring 1 .90 .220 122 Sight Detent Spring 3 .277 .121 7uffer Spring (carbine) 1 10.7 .940 36uffer Spring (rifle) 1 12.5 .940 44olt Catch Spring 1 .517 .154 11olt Ejector Spring 1 .904 .10 28uffer Retainer Spring 1 .940 .180 14isconnector Spring 1 .350 .150 7ection Port Cover Spring 1 .670 1.85 30

xtractor Spring 1 .222 .145 5orward Assist Pawl Spring 1 .290 .079 10 1/2orward Assist Spring 1 1.171 .420 9

ont Sight Detent Spring 1 .750 .115 20agazine Catch Spring 1 1.15 .294 8

afety Selector Spring 1 .904 .10 28akedown Pin Spring 2 1.10 .088 40

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