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Posted: 12/5/2004 9:38:49 AM EDT
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I bought one of the DPMS 2 piece steel buffers and one of the Colt 9mm one piece steel buffers. On both of them the spring binds on the buffer body when you compress it. the inside diameter of the spring seems to small. I tried a few different brands of springs and all where the same. The only one I found to fit them were the ones out of the chinese stocks going around. Do the 9mm buffers use a different spring? I bought these use on a 10" barrel that also has a fat boy tube on it. It locks backs the bolt with no problem using the fat boy and the steel heavy buffer. Reckon this barrel has a monster hole for a gas port ? Or maybe heavy buffers do not really do anything? |
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Mine uses the same spring as the normal carbine buffer of H buffer. Binding or not, I never checked that at full compression....but it works, so I guess it can bind all it wants. The heavy buffers are to prevent bolt bounce in full auto (keeps the bolt from bouncing out of battery and having a light primer strike), should never cause it to short cycle. Just because there is more mass in the buffer doesn't mean the recoil system will have trouble moving it, it just does it slower. Slow the cyclic rate/stops bolt bounce. The fat boy can be used to reduce the effects of a large gas port, by spreading out the gas pressure over a longer time span. |
The spring still has me wondering whats up.
Never really believed in that. I thought the slide weight for was for that. I have always believed the light strikes are from short stroking and the hammer following the carrier home untill it looses enough energy it quits igniting the primer and it stops with the hammer down.
Thats what I thought it was suppposed to do. But I thought you could increase the weight of the buffer untill you got short stroking which was what I thought would happen with a fat boy and the steel buffer. Guess I will pull the sight base and see how big the hole is. |
That can happen too, I guess. I have experienced bolt bounce numerous times. I converted a bunch of surplus government M16A1s into 11.5" M16 with M4 stocks. At first I used the standard semi buffer, every single one had bolt bounce, moved to the H buffer, that fixed some, and then to the 9mm buffer and that fixed the rest. Bolt bounce, generally the weapon on full auto will fire 2 to 3 rounds and then fail to fire. The hammer will be in the fired position and generally there will be a light primer strike. That was my experience. Most closed bolt full auto weapons use some method to deal with bolt bounce, the MP5 has inside it's bolt, loose metal filings sealed inside, when the bolt slams home a split second later the metal filings slams home to stop the bolt from bouncing out of battery. |
| Here is alot of info on short barrels and gas port issues....ar15.com/forums/topic.html?b=3&f=14&t=153425 |
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