As the name implies, this new generation Extreme extruded rifle propellant is a clean-burning powder designed expressly for the 50 caliber BMG cartridge. 50 in (12.7 mm) caliber firearm cartridge developed for the M2 Browning machine gun in the late 1910s, entering official service in 1921. 50 Browning Machine Gun (.50 BMG, 12.7×99mm NATO and designated as the 50 Browning by the C.I.P.) is a. I've read some mixed reviews between the Geissele and Timney and not. I have my lower complete and would like to swap out the trigger for a Timney but don't know if this is the right choice. After diligent research, the desired machines were found, purchased, and put into place. X-Caliber Barrel and MFG was born in late 2013 with its sights set on one thing, and one thing only: Producing High Quality Barrels. 750 adjustable gas block, and A2 flash hider. Barrel is finished off with a PSA 15' Lightweight M-Lok free float rail.
Chambered in 6.5 Grendel, with a 1:8 twist, M4 barrel extension, and a rifle-length gas system.
