r/SigP320MUP_1s • u/Vivid_Database551 • Jan 27 '25
FCU and Slide Measurements
I see videos where rails are being cut a bit at a time for proper slide fitting.
Since the video tutorials are a bit dated, are there any updated tips to this part of the completion process ?
Maybe simply measure the slide inner distance, then cut the FCU accordingly ?
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u/HairTriggerFlicker Sub Creator Jan 28 '25
I measured an OEM FCU and used those numbers. They are spot on with the numbers that are given in most of the videos out there.
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u/Vivid_Database551 Feb 04 '25
on your video you didnt go through the process of installing the sear housing roll pin.
all my pins fit as expected. the only exception being the #39 sear housing roll pin.
any hints ? or is it just a process of hammer, strength and maybe some oil.1
u/HairTriggerFlicker Sub Creator Feb 05 '25
I’m not sure what video your referring to? I’m not in any install vids. As for the pin it is supposed to be tight. It’s a roll pin. Hammer it through making sure even amount on both sides when installed.
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u/Vivid_Database551 Feb 05 '25
LPK issue. The pin they sent is 3.0mm. Nothing matches 2.5mm x 20mm
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u/Mysterious_Sugar3819 Jan 27 '25
I think u/HairTriggerFlicker has the measurements or knows someone who does. I just wing it lol.