65 Receiver Set with Polymer mags from PF (HOPEFULLY)

[LRRPF52]

Are you not the one who advocates for the Grendel to be used as a LMG and DMR/Light Sniper Rifle? The latter would never happen with the current magazine options. And no reliability is not the problem. It's that annoying rattle when you load the magazines near max. It's rather hard to conceal your position when every time you move, it sounds like a monkey playing in the junkyard.

The fact is the Grendel in the AR15 does leave performance on the table, even if we want to keep the 55ksi max. This is especially true with solids. It would be nice if we could make use of the Barnes 127gr LRX. To bad we don't have a magazine that would allow us to load it long enough to get useable velocity.

You may think that the performance increase is negligible and I do tend to side with you. However, the market has shown that it'll pay premiums for marginal improvements (weight reduction, .....). The 6.8 has taken a huge share of the marketplace because of nothing other than dedicated marketing. We need to do something to take back that market share. Only then will we get more Grendel dedicated products brought to the market. I want more affordable bullet options! haha

Nobody, who has ever did a magazine change under pressure, will tell you that .308 mags are the answer (except some NFL lineman). Forget about magazine retention. They're just to big.

We need 25-30 magazines that work reliably and don't rattle. Narrowing the ID of the magazine maybe a solution for getting a polymer magazine that doesn't rattle. However, I suspect that this magazine in a 25-30 variant would be so long that firing from the prone would not be feasible.

Of course the smallest package that meets requirements is always the best answer on the battlefield. The 5.56 does a great job with this. However, that package seems it's just to small to meet requirements. We may need to look at going the width of the AR10 magwell, with the length + 0.100" of the AR15 magwell. We can still keep weight and size down by keeping AR15 BCG and extension.

An LMG will be built around the cartridge, once the cartridge performance requirements are established.

For a DM/SASS carbine, I agree that a rifle needs to built around the cartridge. There is a lot of competition right now for such a system, so any discussions about it are best kept offline.