Originally Posted by
scottryan
Because the PWS system uses a operating rod attached to the top of the carrier with cheap YFS brand screws.
A lot of people don't like YFS simply because they are made in Taiwan (and not the United States), and people incorrectly assume Asian things are poor quality. But I have used YFS screws in DI and piston guns, and they have always been fine. In my opinion, they are actually at least good quality threaded fasteners, and maybe even very high quality.
I've seen a lot of junk threaded fasteners in my life, and none have been YFS.
When I hear people badmouth YFS screws, it reminds me of people who didn't like Gearwrench brand wrenches back in the day because they were made in Taiwan. Eventually people realized they were very high quality.
One benefit about having YFS brand screws is that you at least know the source/manufacturer of the screw. The generic no name stuff out there always makes me nervous. I often check the DI gas key screws on ARs I come across. YFS screws may actually be the most common DI gas key screws out there currently.
Joe Mamma
"Reliability above all else"
NRA Certified Pistol and Rifle Instructor, Life Member
Glock Certified Armorer
Beretta & Sig Sauer Certified Pistol Armorer
Colt Certified 1911 & AR-15/M16/M4 Law Enforcement Armorer
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