Killbuckets just announced at his Facebook Page that his Air-Sharp Custom M1919 Browning is now ready for purchase. For US$350.00 (US$375.00 if via Paypal) you can get the body and tripod without the internals. As for the internals you can specify which gearbox mounts you want to use with it, which can either be an M249 or an M14 gearbox.