Handguns and Conversions
Les Baer offers both his Baer 1911 Premier II 5" and Premier II Super-Tac pistols either in .400 Corbon or as a .400 Corbon & .45 ACP dual caliber combination.
Nearly any .45 ACP pistol can be converted to utilize the .400 Cor-Bon cartridge with only a drop-in replacement barrel, and sometimes a heavier recoil spring (for 1911s this is usually an 18-20 lb. spring, although a few need a 22-24 lb. spring). Suitable recoil springs are easily installed when changing barrels and readily available from many gun parts suppliers, including Wolff Gunsprings. There is no need to buy new magazines or guide rods or change extractors.
Because the .400 Corbon shares the same breechface dimensions as the .45 ACP, modern M1911s can be converted to it without requiring a replacement slide or ejector. Since a .400 Corbon conversion virtually matches the performance of the 10 mm yet does not require purchasing another handgun, some call it the "cheap man's 10 mm." A conversion also retains the versatility of easily converting back to .45 ACP as needed. In this context, Gun & Ammo wrote,
The .400 Cor-Bon is one of the more useful of the current crop of .45 ACP offspring. There are faster rounds, but the .400 Cor-Bon is simply easy to get along with. You don't need extra-heavy springs or tricked-out guns for this round -- just drop a .400 Cor-Bon barrel in your favorite .45 and you are good to go.
As of July 4, 2008, the following companies offered .400 Corbon conversion barrels: Clark Custom Guns (drop-in standard and compensated barrels for 1911s); EFK Fire Dragon (1911s, Glocks, Sig P220, HK USP, and the Springfield XD); Fusion Firearms (1911s); Jarvis Inc. (1911s) (Glock); King's Gun Works (1911s); and Les Baer (1911s in National Match grade in 5" and 6" inch barrel lengths). Roto 4M (1911 series barrels in 4-1/4" (Commander), 5" and 6" lengths (Government)). Bar-Sto no longer offers them. Lone Wolf Distributors also offer a drop-in conversion barrel in 400 corbon for the glock 21. StormLake offers drop-in for Glock 21 and Glock 30.
Read more about this topic: .400 Corbon