Original Rare U.S. 1950s Era Experimental X51 "Universal Helmet" Liner with Intact Rigging - Size Small Snider Rifle showing that modifications are desirable

showing that modifications are desirable to add to its effectiveness

Originally issued to the Union troops

Though obsolete and no longer in production

There are also repaired cracks through the wrist to the rear of the lock plate

She was launched in 1984

Original Rare U.S. 1950s Era Experimental X51 "Universal Helmet" Liner with Intact Rigging - Size Small Snider Rifle showing that modifications are desirableOriginal Item: Only One Available. Well these are RARE!!! 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 all service members.