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Posted: 7/16/2017 3:33:33 PM EDT
What difference will I notice when using a 7.5oz extended Buffer and a 5.5oz Carbine Buffer with NFA Spacer? Carbine Buffer spring will be used.
PSA Lower Spartan Upper w/ LRBHO KAK 8" Barrel Spinta Bolt KAK Shockwave Blade and Tube |
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A little less bark and blast....due to a very slightly ( milliseconds longer ) bolt closure... but most people also mess with the springs as well.
A little more muzzle dip from the added mass. If you buy a heavier buffer.... consider this one... since you can configure as you need. https://www.kakindustry.com/review/product/list/id/558/category/64/ |
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Quoted:
A little less bark and blast....due to a very slightly ( milliseconds longer ) bolt closure... but most people also mess with the springs as well. A little more muzzle dip from the added mass. If you buy a heavier buffer.... consider this one... since you can configure as you need. https://www.kakindustry.com/review/product/list/id/558/category/64/ With the 8" barrel, you get enough back pressure to cycle all kinds of ammo. |
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KAK sells both an 8 oz and 10 oz extended buffer. They also sell a configurable extended buffer than lets you adjust the weight up to 8oz.
The catch is the configurable buffer costs $80, while you can get the 8 oz buffer for $32 and the 10 oz buffer for $50, so for $2 more you get complete 8 oz and 10 oz buffers. In most cases either of them will work. Given they are extended buffers, you won't need the spacer anymore. Generally speaking the point of an extended buffer in a semi auto 9mm AR pistol is to reduce the bolt over run and thus reduce the bolt speed on the return, which helps keep the bolt stop from getting beat to death in a Colt pattern 9mm carbine. A heavier, extended buffer will however also add weight and reduce the bolt velocity (and the felt recoil) while also keeping the bolt over run time short enough for reliable feeding. If the bolt is running too fast with warm 9mm loads, it will tend to pass over the last round or two in the magazine before it can rise far enough to present the cartridge rim to the bolt face. |
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