Buffer tube assembly weight question?

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Mohave-Tec

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I've got about 30% of the parts needed for my first AR build. I'm going to use a variable/adjustable gas block on an 18 inch barrel. I'm hoping like hell that my pet load for my KelTec and Savage will shoot well in this gun as well; a 60gr VMAX over 25gr Varget at 2.250. I'm trying to find something that makes me warm and fuzzy over choosing a buffer weight for a set up like this but I still haven't been able to process this in my mind. What to do?!
 
It will probably run with any weight buffer. The adjustable gas block should allow you to run any buffer. Start with an H buffer. You have room to move up to a H2/H3 or down to a carbine buffer.

I am assuming this is a collapsible stock.

Don't over think it. Buffers are cheap, If you don't like the 1st one, sell it and get another.
 
Easy enough to reduce the weights in the buffers if it comes to that. Just be certain to replace removed individual weights with spacers to control the fore-aft travel inside the buffer.

So, if you think you might need to customize, start either with an "H" at around 107 grams or even a 2 piece at around 155 grams. Either can be weight reduced.

This, assuming you're talking carbine stock with the 18 inch barrel.
 
I don't know much of anything about buffers. I'm an experience gun owner/reloader but I've just not approached the AR before. I just don't know. I have a Mega lower and Bravo Company BCG.
I assume that the greatest consideration for buffer length is for shouldering the rifle?
 
There are three types of buffers; A2 fixed rifle buffer, Carbine/collapsible and the newer VLTOR A5 longer collapsible.

Types:
stocks.jpg

Buffers types disassembled
buffer-construction.jpg

weight chart: the left collumn and bottom left cell is the only info you need.
BufferTable-1.gif

over/under gassed chart
ARejectionpattern.gif

I found these links on the interweb. I have no association with any of those sites. I have used this info in the past to build a few nice rifles.
 
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Excellent. Just a very short while ago I found these graphics and a really well written outline summation of the roll of the buffer assembly in an AR. Now I'll be able to process the information and make decisions.
 
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