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USM4 15001522 Fire Control Tin
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JEK's Review of USM4 15001522 Fire Control Tin

The first review I saw on this says 3.5lb pull. Never, not even close.
I agree that the pull weight is well over 10lbs. When I first did a dry-fit of the trigger I noticed that the disconnect was gritty. I get the old 1000 grit sandpaper out and give both sides of the disconnect a quick polish and these seems to rectify that problem.
After getting it installed I try a couple of dry fires, I first thought that something was very wrong with my assembly and the safety selector had dropped to safety ON, nope this thing is just heavy.
I will be removing this trigger even before the first fire. Since I have been buying parts for about 2 years, I know I am well past any return as well as not even recalling what vendor I made the purchase from.
If you are choosing parts on your own, spend the extra money for a WELL KNOWN brand name part. Doesn't matter what the part is, the old saying is true "you get what you pay for"
Pros:
  • None
Cons:
  • heavy pull
  • gritty/ dirty feel
Best Used for:
  • building up your trigger finger muscles
Would Recommend: No
Was it helpful to you? Yes | No
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Last updated 2025-11-12 UTC.