Tweet
I know for the AR9 total ideal weight for the BCG and Buffer should be a minimum of 22oz.
What is the ideal weight combo for an AR40? My 40 BCG is 13.7oz.
Internet research says I need a 10oz buffer?
This is for a 16in setup.
This is from 80percent. They recommend a lighter buffer?
AR 40 buffer systems are quite straightforward which is convenient when piecing together your PCC build. When dealing with pistol caliber carbine builds, start with the buffer weights that we use for AR 9 pistols — reliably performing buffers are weighted anywhere between 5.4 oz to 7.4 oz. So for .40 cal, that tells us our buffer weight for the AR 40 is going to be a bit lighter than that range due to the larger caliber having more pressure behind the round when fired.
We would suggest buying a heavy tungsten buffer weighted at 4.3 oz paired with a pistol/carbine buffer spring. Together, the unpleasant buffer “rattle” should be eliminated, perceived felt recoil will be reduced even more, weapon reliability will be increased with reduced wear on internal parts and bolt bounce will be negated. If, for any reason, your AR 40 does not work well with this setup you’ll have to go with a lighter or heavier buffer weight based on your diagnosed symptoms. For example, if you have cycling issues then it’s possible the weight is too heavy and it isn’t allowing the BCG to go back in the battery with the correct timing. But if you feel the bolt’s movements are too violent, then perhaps you could go with an even heavier buffer to smoothen it out.
What is the ideal weight combo for an AR40? My 40 BCG is 13.7oz.
Internet research says I need a 10oz buffer?
This is for a 16in setup.
This is from 80percent. They recommend a lighter buffer?
AR 40 buffer systems are quite straightforward which is convenient when piecing together your PCC build. When dealing with pistol caliber carbine builds, start with the buffer weights that we use for AR 9 pistols — reliably performing buffers are weighted anywhere between 5.4 oz to 7.4 oz. So for .40 cal, that tells us our buffer weight for the AR 40 is going to be a bit lighter than that range due to the larger caliber having more pressure behind the round when fired.
We would suggest buying a heavy tungsten buffer weighted at 4.3 oz paired with a pistol/carbine buffer spring. Together, the unpleasant buffer “rattle” should be eliminated, perceived felt recoil will be reduced even more, weapon reliability will be increased with reduced wear on internal parts and bolt bounce will be negated. If, for any reason, your AR 40 does not work well with this setup you’ll have to go with a lighter or heavier buffer weight based on your diagnosed symptoms. For example, if you have cycling issues then it’s possible the weight is too heavy and it isn’t allowing the BCG to go back in the battery with the correct timing. But if you feel the bolt’s movements are too violent, then perhaps you could go with an even heavier buffer to smoothen it out.
Comment