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Posted: 3/16/2017 6:18:01 AM EDT
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Ar15 buffer question??
It didn't dawn on me till now because I've never had problems so I thought I'd ask about buffers. My last build is a 16" with non adjustable mid length gas system using a mil spec Tapco buffer and spring. The buffer weighs 2.96oz which seems to be light as a VSeven H1 is 3.7oz. The rifle has a full auto and weight NiB BCG. The rifle has zero issues but I have no idea right now as I'm writing this if the brass gets flung back, middle, or forward due to pressures. I'm building two more AR's right now. Ones going to be for long range and very heavy and the next is going to be as light of an AR that I can afford to build (4.7-4.9lbs). The heavy long range AR will be complete tomorrow and will be 20" with rifle length non adjustable gas system, full auto and weight NiB BCG, and a UTG A2 stock, buffer and spring. The buffer weighs 5.21oz. The light weight AR will be 14.5" with mid length non adjustable gas system, full auto light weight BCG or Ti BCG (8.5oz or 7.9oz), and I was planning to use the Tapco mil spec setup again. So the question is will these two new rifles function or not with these gas system lengths, weight of the BCG's and weights of the buffers? |
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Gas systems for barrel lengths and buffers and bcgs are fine that you have.
They will run fine. I just built a midlength 16" non adjustable gb, FA bcg (stag) with stags standard carbine extension tube/buffer. It cycles great. I watched my buddy shoot it and it ejects at 4 o'clock. The 14.5 will cycle fine as well. a lot of good info and a lot of people have middy 14.5's and they expierence no issues. Stick with the tapco milspec carbine for this one. The 14.5 middy will have less dwell time which means less force from the decreased volume of gas, throwing the bolt back. As I said it will run fine. All your builds will |
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A 20” barrel with a rifle stock will work well with the std spring and buffer.
Unless the gas port is undersized a collapsing stock with a std spring and buffer will work for you. Note that assumes everything else is ok. In 30 years I have only found one weapon where the gas port was undersized. All of my collapsing stock weapons have heavier than std springs and buffers. I generally use H2 buffers, but keep std through H3 buffers for testing. |
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Trimming weight on a defensive rifle by using lw bcg and/or buffer doesn't seem worth it to me. My lw AR is a BCM 16"mid lw barrel with Aimpoint R1, CTR, Troy TRX11 and I use a LMT ebcg and H2 since the barrel is a bit overgassed. I don't feel the extra few ounces in the rear make it feel any less handy and it fires 5.56 without issue.
Competition ARs with tuned gas (restricted) shooting lower pressure 223 are a good host for the lw bcg, buffer combo. |
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After doing extensive testings myself, and I'm not sure if this is scientific at all, but it appears to me that a stronger spring the better the rifle functions. I use Sprinco red, with a H buffer on a carbine, doesn't matter the barrel length. It feels a heck of a lot smoother. The entire operation feels a lot better and responsive. Standard bcg weight.
As a matter of fact, the heavier the buffer, the smoother things feel. I tried a H3 in the same set up, and it feels much smoother but after it gets really dirty, it seems to degrade a little. So I went back to a H2 at max, and a H at minimal. |
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