10-28-2014, 01:09 AM
LRRPF52 Wrote:You do need a new upper if you want to fit the wider polymer magazine into it. Then you have to machine a different bolt carrier with enlarged cartridge cutaways on the bottom, just like you have to do with 7.62x39 and the LWRC. That's another reason why the Six8 receiver set approach is probably a non-starter.
As to Lancer mags, 10k units would break down like this if we did a group go fund them project:
100 forum members would have to pay for 100 mags each.
250 forum members would have to pay for 40 mags each.
If we could get a few 6.5 Grendel companies on board to up front initial outlay, we could share it all across the board, spec out a mag, and fork out the investment.
I agree that you'd want a new upper designed for the wider lower, but I don't think you'd need it. I completely disagree on needing a new carrier, that could potentially limit how wide you went. Or it might not be a bad idea to design the mag to single stack the last round, like the XD/XDm pistol mag.
I've been thinking about it. It seems like if we did this we should lengthen the magwell 0.15" to 0.20". If the buffer retaining pin location was moved equal distance, it'd allow us to keep the same carrier.
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