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Posted: 7/23/2017 4:00:10 PM EDT
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I'm in the process of piecing together an 11.5" bcm while I'm waiting on the stamp for the sbr and the suppressor. I'm assuming I'll need an H2ish Wright so What's the best version a spikes ST model PWS or just a standard BCM h2 buffer?
Thanks for the help |
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I'm in the process of piecing together an 11.5" bcm while I'm waiting on the stamp for the sbr and the suppressor. I'm assuming I'll need an H2ish Wright so What's the best version a spikes ST model PWS or just a standard BCM h2 buffer? Thanks for the help I run a Spikes T2 in mine (Ballistic Advantage Barrel, Pistol Length Gas, Spikes BCG as well). Has been 100% with and w/o suppressor. I am assuming you are talking 5.56/223? |
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$47 bucks will give you one that will make'em all....
Configurable Carbine buffer kit... https://www.kakindustry.com/ar-15-parts/lower-parts/ar15-buffer-system 
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$47 bucks will give you one that will make'em all.... Configurable Carbine buffer kit... https://www.kakindustry.com/ar-15-parts/lower-parts/ar15-buffer-system https://www.kakindustry.com/media/catalog/product/cache/1/image/800x800/9df78eab33525d08d6e5fb8d27136e95/i/m/img_20150711_130820286_2_.jpg |
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I've run the T2 buffers, and they are fine. A little on the light side for most of my applications (they usually weigh about 4oz, so between an H and H2), but they do work. I think he's referring to the theory that tungsten powder is a little less effective when it comes to controlling bolt bounce, as it creates less of a dead blow effect than solid weights. That's the reasoning I've heard. I never really had an issue with it, but I ended up saving the tungsten powder out of the one I had and using weights to make an H2 (and later H3).Â
If you already have a carbine buffer, you only need to order 3 tungsten weights from KAK to create a carbine through H3 buffer. That's a good bit cheaper than the full kit (although that is nice, it does include a some stuff you won't need). I'd also get a spare roll pin. If you don't already have a carbine buffer, you need only order the buffer body, buffer rubber bumper, roll pin, 3 rubber spacers, 3 steel weights and 3 tungsten weights. The steel weights are only $1 each if I recall. The whole order will cost you about the same as a BCM H2, but will give you the ability to create carbine, H, H2 and H3 for the same cost. |
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I bought one of those kits on sale for like $35, and made one H2 buffer, and converted another to an H buffer. If you can find an H3 buffer then you may as well just buy that, since the spare parts in the KAK kit will likely never get used.
I haven't tested my buffers yet, but I know my 11.5" suppressed piston upper worked fine with a carbine buffer, so I plan on leaving that one there. The H2 will probably serve me best to calm the violent gasses from my AR pistol. And I am putting the H buffer in my 'SPR' for now to try and make it just a bit smoother. FYI - PSA lowers use Carbine buffers by default, and Colt 6920's use H buffers by default. Be aware that changing out those weights is not as easy as it should be because the roll pins are tight and difficult to hammer into the round buffer (once you put them in, you'll never want to change them). |
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Wasn't sure if you'd see the above edit, so I made a new post:
That looks amazing. I like the idea of being able to adjust it. Is this something you would use in a duty gun? Is it as reliable as a standard buffer? Just FYI, the weights for the various buffers are: Carbine: 3 steel H1: 2 steel, 1 tungsten H2: 1 steel, 2 tungsten H3: 3 tungsten |
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That looks amazing. I like the idea of being able to adjust it. Is this something you would use in a duty gun? Is it as reliable as a standard buffer? That said .. use a fresh roll pin every time you change the weight. |
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Wasn't sure if you'd see the above edit, so I made a new post: It's no different than a standard buffer. The parts I've ordered from KAK were all high quality. The tungsten weights are spot on for proper weight, the spacers are nice and thick; they aren't the cheapo thin type you'd find in some Ebay buffer, and so on. I wouldn't hesitate to use my custom buffers on a duty gun, they are just as good as a factory buffer. The only point of concern with a rebuilt buffer is to make sure the roll pin can't walk out under recoil. That can be remedied by either spreading out the roll pin if you plan to reuse it, or using a new one. Just as an extra precaution, I usually flair both ends of the roll pin to assure it's 100% secure. Just FYI, the weights for the various buffers are: Carbine: 3 steel H1: 2 steel, 1 tungsten H2: 1 steel, 2 tungsten H3: 3 tungsten http://thearguys.com/ar-facts/difference-ar-15-buffers/ |
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That's great info thank you. That's the first I've heard of the bcg bounce. I think I'm going to go the KAK route unless someone has info about why they aren't a good route to go. The reason USGI buffers are "Dead blow" type is because of BCG bounce at full auto. After the "solid" BCG bounces off the breach, the dead blow buffer helps minimize the effect.... but to much weight can be as bad...  AR-15 Buffer Test - High Speed Video - 420 Frames Per Second After watching the video, you can see how BCG bounce is not gonna help full auto fire.... it may not be as much of an issue in a semi-auto. That said.. BCG bounce is more complicated then just that.... spring weights , ammo, etc.. |
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No offense, but I think you are just weighing the weights them selves... and not including the body and buffer bumper.. ( I figured this out the hard way .. Lol ) http://thearguys.com/ar-facts/difference-ar-15-buffers/ Quoted:
No offense, but I think you are just weighing the weights them selves... and not including the body and buffer bumper.. ( I figured this out the hard way .. Lol ) http://thearguys.com/ar-facts/difference-ar-15-buffers/ Carbine Buffer (Avg 3.0 oz) - Includes 3 Steel Weights Heavy (H) Buffer (Avg 3.8 oz) - Includes 1 Tungsten + 2 Steel Weights H2 Buffer (Avg 4.7 oz) - Includes 2 Tungsten + 1 Steel Weights H3 Buffer (Avg 5.6 oz) - Includes 3 Tungsten weights When I said the buffer "weights" needed, I meant literally, the physical steel and/or tungsten weights. I was listing the specific type of weights needed to create each buffer type, so he would know what to do with the 3 steel and 3 tungsten weights. Naturally you need the body, spacers and bumper no matter which one you're making (I listed those in an earlier post). Quoted:
BCG bounce is more of an issue in NON-dead blow buffers... the solid buffers ( typically heavier 8oz+ ) are like smacking a steel hammer on an anvil, the solid hammer bounces... While the dead blow ( sliding weights and rubber spacers ) are, well....like a dead blow hammer... much more of a thud. |
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That's great info thank you. That's the first I've heard of the bcg bounce. I think I'm going to go the KAK route unless someone has info about why they aren't a good route to go. get adjustable gas block normal buffer/bcg less moving mass |
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So that leads to another question is one from damage industries on par with a BCM? I don't have any markings on my current buffers that show the manufacturer |
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A better solution would be a gas port insert from Black River Tactical. I have one in one of my 10.3 inchers. If you want a can on a FSB rifle the insert seems less easy to tune vs swapping buffers. |
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Glad it works for you but for my purposes a buffer is a better solution. Dont want to pound out the pins and remove the FSB just to install a part that I would imagine is more failure prone than a required part like a buffer. If you want a can on a FSB rifle the insert seems less easy to tune vs swapping buffers. Don't really know how this topic got changed to GBs but OP should have an H2 for an 11.5". |
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