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What’s the difference between large pin & small pin? — 1 Answer

by Marcus, from NY, United States Asked on August 31, 2020

Name CMC Triggers AR-15/AR-10 Match Grade 2-Stage Trigger Group (4.6)
$210.00 $201.60 Save $8.40
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Answered by Brandon, member, from UT, United States, on January 11, 2021

The two pins that hold your trigger group into the lower receiver will either be small at .148" diameter, or large at .169" diameter. For example, a Colt AR manufactured between 1991 and approximately 2000 will use large pins. Most other AR's use a small pin. Measure your pins with a caliper to find out what you need.

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