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The Timney 610S is a drop-in replacement trigger built for Mossberg short action rifles running the factory LBA (Lightning Bolt Action) setup. If you've spent any time behind a stock Mossberg trigger, you already know the built-in blade safety and gritty pull can work against you, especially with gloves on or when you're trying to squeeze out a tight group. This unit swaps all of that out for a genuinely crisp, repeatable break that makes the rifle feel like a whole different gun.
Everything lives inside one self-contained cassette-style housing machined from lightweight 6061-T6 aluminum, with the trigger and sear cut from heat-treated steel using wire EDM for tight, consistent tolerances. It ships set around 3 pounds out of the box, but the real draw is the adjustability: you can tune pull weight anywhere from 1.5 to 4 pounds, plus fine-tune sear engagement and overtravel to match exactly how you like a trigger to feel. Folks running everything from a .270 ATR to a 6.5 Creedmoor MVP have dropped these down toward 2 pounds and never looked back.
This is the short action model, so fitment matters. Mossberg used both long and short action triggers across their lineup, so measure from the center of the pin to the center of the mounting screw. If it comes out to roughly .390 inches, the 610S is your trigger. It also includes a two-position, trigger-blocking side safety of Timney's own design, meaning the trigger physically will not move when the safety is engaged.
Installation is straightforward for most and doesn't require a gunsmith. On the majority of factory synthetic stocks it goes in clean. A heads-up worth knowing: on certain stocks like the MVP Varmint, some owners have needed to remove a little material so the front adjustment screw clears, which is easy work with a drill press, Dremel, or even a chisel. Made in the USA and backed by Timney's reputation, this is one of the simplest upgrades you can make to a Mossberg bolt gun.
The 610S is the short action version made for Mossberg 100 ATR and MVP rifles with the LBA trigger system. Since Mossberg used both long and short action triggers, measure from the center of the pin to the center of the mounting screw before ordering. If that measurement is around .390 inches, the 610S is the correct trigger; if it reads closer to .512, you'll want the long action 610 instead.
It comes set at roughly 3 pounds from the factory, but you can adjust it anywhere from 1.5 to 4 pounds. You also get control over sear engagement and overtravel, so you can dial in the exact feel you want. Plenty of owners run theirs around 2 pounds for target and varmint work.
No, this is a self-contained drop-in unit, so most people install it themselves at the kitchen table. On many factory synthetic stocks it goes right in. A few stocks, like the MVP Varmint, may need a little material removed so the front adjustment screw clears, which is simple to handle with a Dremel or drill press.
It uses a two-position, trigger-blocking side safety designed by Timney. When the safety is engaged, the trigger physically will not move, giving you a positive, dependable feel. It replaces the factory blade-style safety that a lot of Mossberg owners find awkward, especially with gloves on.
| UPC | 081950610235 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | 610S |
| Color | MOSSBERG 100 ATR |
| Length | 7.7000 |
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