So I recently bought a factory upgraded Sig P320 and measured its trigger pull at around 10lbs. I figured maybe it needed dry firing and rounds through it, so 1000 rounds later and tons of dry firing and the pull weight hasn't really changed.
I thought about getting a trigger from Gray's Guns which is supposed to drop the weight by a couple of pounds, but I haven't decided yet. Any suggestions? Thanks.This message has been edited. Last edited by: Fuego220,
We tested it against two other P320s which both had a range beween 5-7lbs. What's interesting is that the trigger pull weight was actually reduced by about 1-1.5lbs simply by putting a different slide on the gun. Makes me wonder if part of the problem is that the mating surfaces between the striker and sear are too strong.
I talked to a very experienced gun smith, and he recommended putting a spot of Flitz on the mating surfaces of the sear and striker and then dry firing it about 100x. I cleaned the polish off and relubed it and the pull was reduced by about 1lb. I went ahead and ordered the PELT2 trigger and we’ll see what that does.
If your gauge and technique is accurate, it's definitely out of factory spec. Call Sig CS, get a shipping label and send it back for service.
My 2015 P320C 9mm was a measured 7lbs. That's with a quality gauge with the hook/arm parallel with the slide. It went to 6lb-8oz after the gun was broken in and dry-fired. Dropped to 4lb-14 oz with the GGI PELT trigger and standard spring.
Mine has never been "upgraded".
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