Small pistol drop tube required for 380ACP, 9mm, 38S/SC, 40S&W, 357Mag conversions. Machined drop tube. Drop tube height requires adjustment when doing caliber conversions.
Large pistol drop tube required for 44Mag and 45ACP conversions. Machined drop tube. Drop tube height requires adjustment when doing caliber conversions.
This is required to be ordered separately as it is not included in teh conversion kits.