Colt Automatic Pistol and Revolver Information - 25 years of Service to Colt Firearms Collectors




Colt Conversion Unit .22 LR-.45 ACP - Pre/Post-War Service Model Conversion Unit in Original Box - SN U2104 (ca. 1946)

U2104 Box end label

Standard box end label.

U2104 Box top label

Standard ".22-.45 Service Model Conversion Unit (Floating Chamber)" label on top of box.

U2104 Parts description inside lid.

Listing of eight component parts for the .22-.45 Service Model Conversion Unit printed inside box lid.

U2104 Pictured in original box with all accessories.

U2104 pictured in original box with instruction sheet as shipped from the factory. Set includes the original brown tissue paper used to wrap the slide when shipped.

U2104 Unwrapped!

Unwrapped slide pictured with component parts.  Barrel assembly is in slide.

Right side slide markings

Close-up of right side slide markings.

Left side slide markings

Close-up of left side slide markings.

Serial number markings

Photo of U 2104 serial number on top of slide in front of rear adjustable sight. Top of slide has a matte finish.

Gun of the Month

January 2022

Contact Us


Home | Wants | Gun of the Month | Historical Info | Instruction Sheets
Site Search| Online Bookstore | Colt Care | Links

Questions / Comments? Contact Us!

The Rampant Horse and Colt logos are registered
trademarks of Colt's Manufacturing Company, Inc. Hartford, CT

Copyright 1996 - 2024 by All rights reserved.
Please read our online Privacy Statement
The logos and all proprietary artwork and photos are the property of and may not be reproduced or distributed without expressed written permission.