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The Range
Rifle & Shotgun Discussion
Best wt for an AR buffer ?
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<blockquote data-quote="HansTheHobbit" data-source="post: 2764508" data-attributes="member: 38141"><p>I don't really have any experience with 7.62 and 300BLK ARs, so this is just in answer to your question regarding the 5.56 ones. The short answer is probably yes. Especially regarding the 20''. The 20'' was likely drilled at the gas port for a rifle buffer, which I believe is 6.2oz, so it's probably way, way overgassed with a 3oz. The 3oz buffer was designed for a 14.5'' carbine length system.</p><p></p><p>Most ARs are overgassed to begin with, so that they work with most ammunition even under adverse conditions. For example, most ARs will run weak .223 even when dirty, so you're going to get less than ideal results when using hotter ammo. So most people upgrade the factory buffer with something a little heavier. For example, most 16'' ARs will work just fine with a 4oz buffer, even with .223 whatever ammo.</p><p></p><p>Long story short, with the 20'', definitely upgrade to at least a 5oz buffer. With the 16'', you would probably be okay sticking with the 3oz, but a 4oz may make it shoot smoother with 5.56.</p></blockquote><p></p>
[QUOTE="HansTheHobbit, post: 2764508, member: 38141"] I don't really have any experience with 7.62 and 300BLK ARs, so this is just in answer to your question regarding the 5.56 ones. The short answer is probably yes. Especially regarding the 20''. The 20'' was likely drilled at the gas port for a rifle buffer, which I believe is 6.2oz, so it's probably way, way overgassed with a 3oz. The 3oz buffer was designed for a 14.5'' carbine length system. Most ARs are overgassed to begin with, so that they work with most ammunition even under adverse conditions. For example, most ARs will run weak .223 even when dirty, so you're going to get less than ideal results when using hotter ammo. So most people upgrade the factory buffer with something a little heavier. For example, most 16'' ARs will work just fine with a 4oz buffer, even with .223 whatever ammo. Long story short, with the 20'', definitely upgrade to at least a 5oz buffer. With the 16'', you would probably be okay sticking with the 3oz, but a 4oz may make it shoot smoother with 5.56. [/QUOTE]
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