8-10oz AR PCC buffers in Canada?

[G.Mitchell]

I scored two FX-9 carbines that I’m setting up and I’m not pleased with the bolt and buffer weight being so light.

I’d like to try and find longer and heavier buffers in Canada. Looking for closer to 4” long and weighing 8oz to 10oz.

Anyone find something like this already in Canada?

Thanks

 

[Stevo]

I scored two FX-9 carbines that I’m setting up and I’m not pleased with the bolt and buffer weight being so light.

I’d like to try and find longer and heavier buffers in Canada. Looking for closer to 4” long and weighing 8oz to 10oz.

Anyone find something like this already in Canada?

Thanks

That seems really excessive for weight. Mine ran well with a rifle spring and H buffer.

Also, when I put a spacer in the tube to reduce bolt over-travel to a minimum, the gun rarely locked open.

 

[G.Mitchell]

That seems really excessive for weight. Mine ran well with a rifle spring and H buffer.

Also, when I put a spacer in the tube to reduce bolt over-travel to a minimum, the gun rarely locked open.

From my research 18-24oz combined bolt and buffer weight is best for a 9mm blowback rifle. My bolt weighs 11.8oz which is why I’m after 8-10oz. I can pull and swap internal buffer weights to further tune as needed.

 

[Ravage]

That seems really excessive for weight. Mine ran well with a rifle spring and H buffer.

Also, when I put a spacer in the tube to reduce bolt over-travel to a minimum, the gun rarely locked open.

Did you see excess burnt powder on the ejected casings ? I saw tons of it as I stepped up buffer weight the gun cycled better smoother and there was less and less powder burnt on the outside of the casing because the bolt was being held closed longer. They come from the factory with light buffers to allow them to cycle with the cheap underpowered loads Murikans can buy but when you use regular ammo you see more issues especially as we also have the 18.5% barrels so way longer then what the FX-9s have down south

 

[Stevo]

Did you see excess burnt powder on the ejected casings ? I saw tons of it as I stepped up buffer weight the gun cycled better smoother and there was less and less powder burnt on the outside of the casing because the bolt was being held closed longer. They come from the factory with light buffers to allow them to cycle with the cheap underpowered loads Murikans can buy but when you use regular ammo you see more issues especially as we also have the 18.5% barrels so way longer then what the FX-9s have down south

No dirtier than the same ammo out of my Glock.

 

[Unholysavage]

Curious to see what you find.
Moving to a Odin adjustable AR/H3 buffer made a massive improvement in my fx9. The rifle was a harsh, unreliable POS before upgrading to a heavier buffer and spring. Some guys here bought the Odin adjustable PCC buffer that gets up to 7.4oz with good success, but they haven't been easy to find since the OIC was announced. Not quite as heavy as you're looking for, but you might be able to find one up here

 

[alpining]

Interesting stuff, thanks guys.

Can anyone here give details on how a heavier buffer / spring changes cycling, operating, and internal ballistics?

I thought I understood it fairly well for my AR, but straight blowback is a bit of a different beast.