For the discriminating Bullpup'er: A 6.5mm Grendel-chambered Desert Tech MDR

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There are huge engineering challenges with making a modular, quick caliber change rifle work at all. Just look at the Masada/ACR, SCAR, XCR, etc.

The caliber change kits have been long in the waiting for all of those designs. To change to a totally different parent case and action length within the same action now requires some way to address bolt travel differently, like when going from 5.56 to 7.62 NATO. Easier said than done.

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I fully agree. Moreover, my own experiences with taking ideas I'd drawn on paper and turning them into working prototypes earned my deep respect for the professional arms designer and the machinist. My Project: Sky-Pup was one such example ---




Truth is: When I first looked into the face of the beefy K&M Arms 3-lug triangular Bolt Ken McAlister designed, machined for the .308 Winchester, this morning, alongside his .223 Bolt (http://bullpupforum.com/index.php?topic=...9#msg65679), my first thought was, 'Now, there's a proper Bolt for the 6.5mm Creedmoor, with enough meat in it to open it up to accept the 6.5mm SAUM!'

But, almost simultaneously, the thought came to mind, 'Finally, the right combination of Bolt-Barrel Extension and magazine length to allow "The little cartridge that could [heretofore, in the AR-15 platform, with one arm tied behind its back]" now be free to be all it can be" --- to the delight of 6.5mm Grendel Enthusiasts, everywhere. Thus: My Reply to Ken (http://bullpupforum.com/index.php?topic=...8#msg65698), who is a manufacturing engineer.

I wish Ken the best of luck in this challenge.



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