If anyone one is looking for a compatible upper for their SR25 , MWS , AR-10A , OBR

AR/M4 Beyond 5.56/.223
1

If anyone is looking to have a second upper or do a 6.5cm or wants to build a lightweight blaster. There is a company now offering a compatible upper.

http://genesiscnc.com/product/genesis-308-upper-receiver/