Can anybody tell what buffer weight and spring is used in this
https://palmettostatearmory.com/psa-10-5-pistol-length-300aac-1-8-phosphate-9-lightweight-m-lok-btr-classic-pistol.html
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@sean.psa would probably need to ask.
I am going to assume standard C spring but not sure on buffer.
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Mine was a different mode, purchased many years back came with carbine buffer & spring. Added an H buffer to tame ejection
As far as I can tell, a standard weight carbine buffer is what PSA always includes. Maybe not true for the Sabre line, but that’s a different animal. It’ll work fine with that, but you may want to have heavier buffers on hand to settle things down once you get it in and test with your ammo
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i’m gonna guess here and say that since it is a carbine gas system they are probably using standard Carbine buffers, unless a particular gun was failing to eject properly when it was test fired. then they may have tried different buffers to time the gun properly.
Oh I already got it and it’s under gassed as hell or I believe it is. It’s ejecting over my shoulder. My buffer is getting beat to hell by the retainer pin. So it’s basically unusable just because I do not want that pin snapping off in my gun
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under-gassed?
Well that doesn’t sound good at all. Ejecting back that far definitely sounds under-gassed. What ammo are you using? Unsuppressed?
If the buffer retainer pin is getting hit by the buffer that’s a problem too. To state the obvious, the buffer shouldn’t hit the pin when the upper and lower are closed. Would you mind taking a picture of the front of the buffer as it is installed? For a new gun to have that issue is concerning. Not that you need to go down the road for this yet unless you want, but you might have a warranty issue.
Hard to tell on those pics but im not seeing a lot of damage…
I’m pretty sure the upper isn’t pushing it back far enough
get a H2 buffer for 300blk… very smooth, thats what i run
A heavier buffer is always good. I use the Spikes T2 in my 300blk SBR.
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Yeah, the upper not pushing the buffer in properly is almost certainly the cause. I’m not doubting there is something wrong, because clearly there is, but it seems like it would take a huge error to have the upper not push the buffer in far enough to keep it off the retaining pin because the buffer looks like it is sticking well forward. With the upper installed, is there a large gap at the back? Does it feel or look like the rear of the BCG pushes the buffer in when you close the two receivers?
I fell push while closing it been when it closes up all the it seem like the tension is lost. PSA either needs to send me something or fix it
If the buffer retainer hole is drilled too far back, that would do it? Do you have another lower you could swap the upper onto to see if it maintains pressure as you close it up?
I do not.
Its not drilled too far back.
Since you are shooting 147 instead of 110-120gr. I would try either a stiffer spring or heavier buffer. That will slow down the speed at which the bcg moves rearward pushing on the buffer and help smooth things out.
Actually thank you for saying something I meant to check earlier and I was wrong it’s 125gr