Geissele Automatics Geissele 6mm G-Strat Cut Rifle Barrel Blank 30-1313-2700-243-075-01-A

For anyone building a custom 6mm rifle from the ground up, the Geissele 6mm G-Strat Cut Rifle Barrel Blank 30-1313-2700-243-075-01-A gives a gunsmith exactly what's needed to start cutting: a precision-machined barrel blank, made in the USA, with a 27.00-inch G-Strat pre-contoured profile chambered for 6mm (.243). This isn't a finished barrel — it's the raw foundation a smith works from to cut the chamber, rifling, muzzle threads, and crown to whatever spec the build calls for. That flexibility is really the point of buying a Geissele barrel blank instead of a finished one. It arrives unrifled and unthreaded, which means the twist rate gets determined during finishing rather than showing up fixed out of the box. For general-purpose 6mm work, a 1:7.5 twist tends to be the sweet spot — stable enough for lightweight hunting bullets, but still capable of stabilizing the heavier, long-range projectiles 6mm shooters often chase. Pre-machining weight lands somewhere in the 4.0 to 6.0 lb range, though the final number depends entirely on how the barrel gets cut and contoured downstream. Whether the end goal is a precision rig, a long-range 6mm build, or a dedicated hunting rifle, this 6mm barrel blank gives a builder a high-quality, adaptable starting point rather than locking in decisions before the project even begins. Key Features G-Strat pre-contoured profile at 27.00 inches for custom barrel work Chambered for 6mm (.243) builds Arrives unrifled and unthreaded — twist rate set during finishing 1:7.5 twist recommended for all-around 6mm performance Precision-machined and manufactured in the USA Pre-machining weight in the 4.0–6.0 lb range, final weight depends on contouring Geissele Automatics Geissele 6mm G-Strat Cut Rifle Barrel Blank 30-1313-2700-243-075-01-A