This longer OAL 223 unit is for those wanting the benefits of running the longer VLD type projectiles (only fits Tikka T3/T3x, not LA102). This magazine is specifically designed to suit the Tikka T3/T3x rifles chambered in 223 Remington, and will suit similar 223 geometry cartridges (223 see table in pics) and utilises the receiver feed ramp. This 2.6" unit will NOT fit the Lithgow LA102. Not recommended for use with the 17 Rem, 222, 204 Ruger - suggest to consider the use of the 2.4" AOL unit.