Does anyone have the skinny on XCR hammer springs? I bought an older used model that the PO said was originally X39, its now .223. It has the older trigger and the trigger pull is very heavy. I know RA makes a heavier hammer spring for X39 surplus but I don't know if this one has one or the standard spring. I understand AR hammer springs fit but before I run out and buy one has anyone swapped them out? Does an AR spring really fit? Would a reduced power spring like the JP one work? Are AR hammer springs pretty consistent or can spring rates vary? Thanks in advance.


















































