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Anyone who has run an AR hard knows the frustration of glancing down mid-string and seeing a trigger or hammer pin creeping out of the receiver. The KNS Precision Gen 2 Mod 2 Non-Rotating Pin Set puts an end to that. Instead of relying on the factory friction fit, this system links both pins together with external stainless steel side plates and retaining screws, so nothing rotates, walks, or slips no matter how much you shoot. The pins themselves are precision CNC machined from match grade stainless steel with a matte black finish, and this particular set uses the oversized .155" diameter to tighten up worn lowers or receivers that came a touch loose from the factory.
The standard AR pin is .154", and plenty of lowers run just fine with that size. The extra thousandth on these .155" pins is there to take up play in receivers that have loosened over time or in match-grade triggers that leave a little slop. If your pins push out with finger pressure or you feel wiggle after installing a drop-in trigger, the oversized set is usually the fix. Builders often keep both a .154" and a .155" set on the bench since fitment can vary between brands.
KNS designed the Gen 2 Mod 2 line to be the strongest pins they make, engineered to handle the pounding of full-auto and rapid semi-auto fire across 9mm, .223, and 7.62mm suppressed guns. The anti-creep retainers keep the pins from constantly rotating and wearing out the receiver walls, which is a real concern on hard-used or irreplaceable receivers. Worth noting: the Gen 2 and Gen 2 Mod 2 side plates are identical in strength, with the Mod 2 simply carrying a cleaner cosmetic look.
Installation is straightforward and requires no permanent modification to your rifle. The set drops in with the included tools, and the two small oil-trap holes in the pivot pins keep your hammer and trigger swinging smoothly with a couple drops of lube during assembly. One thing to keep in mind is that these will not work with Jewell trigger systems, so if you are running one of those, this is not your set.
The .154" size is the AR standard and fits most lowers, while the oversized .155" is meant to take up slack in worn receivers or lowers that ran loose from the factory. If your existing pins push out with finger pressure or you feel play after dropping in a match trigger, the .155" set is usually the right call. A lot of builders keep both diameters on hand since fitment can vary between brands like Aero and Noveske.
Yes, it is designed for AR-15 and M16 pattern lowers that use standard trigger and hammer pin spacing, and no permanent modification to the rifle is needed. Keep in mind this specific set uses the oversized .155" diameter, so it works best in worn lowers or with Rock River Arms match triggers. It will not fit Jewell trigger systems.
There is no strength difference between the two. The Gen 2 Mod 2 side plates are simply a cleaner, lower-profile cosmetic update over the original Gen 2 design. Both hold your pins just as securely.
Not at all. The set comes with a brass installation guide and two Torx wrenches, and it drops in without any gunsmithing. Snug the retaining screws to around 8 inch-pounds and add a couple drops of lube near the hammer and trigger springs so the oil-trap holes in the pins can do their job.
| UPC | 851876003172 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | NRTHPMOD2-1555-BLACK |
| Color | AR-15 TRIGGER/HAMMER PINS |
| Length | 5.2000 |
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