So I'm building a Stag-10, my plan is to build 2 uppers for 308 and 6.5cm. I'm just in the starting stages, I have my receiver set, mags and a 24" Ballistic Advantage 6.5cm barrel on the way. I've read that a heavier buffer will slow cycling and be easier on brass, etc. So would an H3 buffer be better for a 6.5cm? And on the BCG, is spending the extra money on a nickel coated one worth it? My plan is a 1000 yard 6.5cm upper and a light weight 308 hunting upper.
Stag 10 6.5cm Buffer and BCG Question.
- Thread starter TA0502
- Start date
Buffer weight will highly depend on your gas system.
Going to too heavy of a buffer can cause issues as well.
Also, are you talking H3 buffer from an AR15? As the AR15 and AR10 buffers are different.
The AR10 takes a heavier one off the get go to account for the heavier weight of the BCG. There are also different sizes, depending on your receiver extension length, and buffer spring.
Going to too heavy of a buffer can cause issues as well.
Also, are you talking H3 buffer from an AR15? As the AR15 and AR10 buffers are different.
The AR10 takes a heavier one off the get go to account for the heavier weight of the BCG. There are also different sizes, depending on your receiver extension length, and buffer spring.
Ya, I'm getting a Superlative Arms adjustable gas block. From the reading I've done it's pretty much mandatory on a 6.5cm. I was looking at a full length AR15 H3 buffer @ 5.6oz, I've found a lot of info searching around but buffer info is pretty erratic and seems to be a lot of different opinions.
They key in your build will be to delay the unlocking process/reduce the bolt carrier speed as it cycles.
1. Having an adjustable GB will allow you to tune the system so that it's not too over gassed, although the best case would be to also have a XL length gas system to reduce dwell time and thus reduce the duration that gas is cycling the bolt.
2. Having a properly tuned buffer system is a must. If you're going with a rifle buffer, then, as far as I'm aware you'll get a 5.4 or 5.6 oz buffer which is standard for the ar10. If you go with a carbine system, then the buffer weights will be less. Some people will go out and buy a 120$ heavy carbine buffer for ar10 to help. Too light a buffer will not cause the BCG to slow down adequately. This will result in the carrier striking the back of the buffer tube (more recoil) and possibly will result in really bad dents and dings in brass. Adding a flat wire spring to the system can help alleviate these issues as they usually will help delay unlocking (more in battery spring pressure) and becuase they have more coils, they will help your buffer manage the BCG speed. They also will help with reliable feeding and locking.
3. Having a full mass carrier (normal BCG) will also help with the above.
Having said all that, the system will need to be tuned (adjustable GB) with all the components on the rifle to help everything work together.
I'm no expert but based on what I've been reeding (and I've done a lot as I'm doing something similar) this is what I've come to understand as fact.
Hope it helps.
1. Having an adjustable GB will allow you to tune the system so that it's not too over gassed, although the best case would be to also have a XL length gas system to reduce dwell time and thus reduce the duration that gas is cycling the bolt.
2. Having a properly tuned buffer system is a must. If you're going with a rifle buffer, then, as far as I'm aware you'll get a 5.4 or 5.6 oz buffer which is standard for the ar10. If you go with a carbine system, then the buffer weights will be less. Some people will go out and buy a 120$ heavy carbine buffer for ar10 to help. Too light a buffer will not cause the BCG to slow down adequately. This will result in the carrier striking the back of the buffer tube (more recoil) and possibly will result in really bad dents and dings in brass. Adding a flat wire spring to the system can help alleviate these issues as they usually will help delay unlocking (more in battery spring pressure) and becuase they have more coils, they will help your buffer manage the BCG speed. They also will help with reliable feeding and locking.
3. Having a full mass carrier (normal BCG) will also help with the above.
Having said all that, the system will need to be tuned (adjustable GB) with all the components on the rifle to help everything work together.
I'm no expert but based on what I've been reeding (and I've done a lot as I'm doing something similar) this is what I've come to understand as fact.
Hope it helps.
stevey3737
Regular
- Location
- Southern Interior
i have a stag in 6.5 it was originally 308 I am running an international match barrel on it and haven't had any problems switching uppers back and forth from the original 308 with an MRA match barrel and i am not running an adjustable gas block on either upper
Interesting information. Thanks!
I'd like to install a Magpul PRS Gen3 buttstock on my BCL 102.
The buffer tube is 8.25" long. The PRS needs 1/4" less buffer length to install.
And I have switched to a new barrel with rifle-length gas system, fixed gas block.
As far as I can tell, I have a few options:
1. A2 Rifle length buffer assembly.
- This seems to have the best chance of actually working.
2. Milspec AR15/M4 buffer tube (7" or a bit more) but with a modified buffer and spring.
- 2.5" buffer (not 3.4?"), weight unknown (H, H1, H2)? and unknown spring length/weight.
- So many unknowns...Is there any math behind this that I can read?
3. Cut 1/4" off my bcl gas tube and see what happens.
- What could go wrong?
Any thoughts?
