There seems to be a lot of questions/interest in utilizing the JSD 80% insert for a 45 acp build. After multiple google searches on the differences between the small caliber (9mm, 40, 357 sig) models and 45 acp versions there was no consensus on the differences, or whether one insert could be used for the other.  To help answer the question I decided to dive in ad give it a go. I ordered a 45 acp build kit from Chris at F & F Firearms and set off. The below is a picture of the kit I received including FCU components from a 45. Upon receiving theRead More →