I think the barrel change will be accomplished with 2 parts:
A Barrel with Extender, and a bolt head as a matched pair, with appropriate headspacing already set by adjusting the threading of the barrel into the extension, and checking the headspace.
The Impulse Hexlock bolt action lockup arrangement, locks into the grooves in the short or long shank extension.
This allows the Impulse to use 110 style barrels.
The bolt head can be removed from the Bolt in about a minute, without tools. This is described in section 2.7 of the owners manual. https://www.savagearms.com/DAM/asset...01-28-3633.pdf
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