The cold hammer-solid barrel is unusual for any .223 Rem in that it's an exceedingly quick 1:7 rifling twist rate, so it is de facto suitable for heavier .22 calibre projectiles – important to note. It is actually 24in in length, with a M15x1 threaded muzzle and cap, and it has a semi-varmint profile of which 12in within the fore-stop is not free