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I am building a pistol length 300blk. I have a stoner side charger upper and a SB Tac SBPDW brace. Would the JP Enterprises JPSCS15H2 be the right buffer spring to use? Does anyone have any experience with the JP part?
Thanks
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Carbine weight
I run H3's in all my 300 Blks.
BCM states to "run H3 buffer" in their 300 Blk guns/uppers.
Depends, you plan on using supers or subs? Suppressed or not? 220 subs can be weak and not cycle reliably to pickup the next round but throw on a can and the extra pressure makes them run reliably. Buy an H2 and H3 to keep on hand you might find yourself swapping them out depending on what rounds your firing.