Original U.S. 1950s Era Rare Experimental X-51 “Universal Helmet” Shell With Incorrect M1 Liner - Missing Left Side Chinstrap & Bale Category_Receiver Both of these are inert

Both of these are inert and have been fully deactivated following guidelines provided by the ATF

disabling the rudder

The Landesschützen-Ersatz-Bataillon 13 was responsible for providing the battalion with a replacement

Often overlooked however is the fate of the U

In early 1951

Original U.S. 1950s Era Rare Experimental X-51 “Universal Helmet” Shell With Incorrect M1 Liner - Missing Left Side Chinstrap & Bale Category_Receiver Both of these are inertOriginal Item: Only One Available. Now this is a rare helmet to come across! There isn't much information out there at all about the X51 helmets, which were developed and tested during the 1950s. They were seen as an attempt to use new technology to improve upon the M1 helmet, which had served the U. S. Military well during WWII. Also with the post war budget cuts, they looked to create a "Universal Helmet", which would be able to meet the needs of