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Most AR-platform rifles leave the factory heavily over-gassed so they'll cycle just about anything you feed them. That works, but it beats up your bolt carrier, throws brass into the next county, and adds recoil you don't need. The Seekins Precision Select Adjustable Gas Block hands that control back to you, letting you meter exactly how much gas cycles the action so your rifle runs smoother, cleaner, and softer.
The standout here is the removable gas switch. You set your baseline gas with an Allen wrench through the fine-position adjustment, then attach the lever for tool-free changes in the field. Slip a suppressor on and flip the switch left for less gas, take it off and rotate right to add gas back for reliable unsuppressed cycling. The best part is your initial setting stays put, so you're never re-tuning from scratch. That on-the-fly design came out of a government program that needed rifles capable of running both suppressed and unsuppressed without breaking out tools.
This .750" model is machined from steel and finished in black Melonite, which fights off wear and corrosion during long strings of fire and holds up to the heat a gas block lives with. The single detent adjustment screw gives you tactile, countable clicks, so you can log your settings and return to them later. Users switching over from cheaper two-screw blocks tend to notice how much simpler and more positive the single-screw setup feels.
The .750" journal is one of the most common gas block diameters on AR-15 barrels, so it drops onto a huge range of factory and aftermarket setups. Its low profile tucks under free-float handguards without fuss. Keep in mind the gas switch lever needs a little clearance under slim rails, so if you're running a tight handguard you can still adjust the main screw with a long hex driver. Whether you're taming a hot 5.56 build, chasing quiet cycling on a suppressed .300 Blackout, or fine-tuning a large-caliber gun that's prone to over-gassing, this block earns its spot.
You set your baseline with an Allen wrench by turning the gas screw in to reduce gas or out to add gas. Once it's dialed, you attach the removable gas switch for tool-free, on-the-fly changes. From there you just flip the lever between settings without ever losing your initial tune.
Yes, that's exactly what it was built for. Set your gas with the suppressor on so the bolt locks back on an empty mag, then flip the switch left for suppressed and right for unsuppressed. It lets you swap the can on and off and re-gas the rifle in seconds without tools.
The block itself is low profile and tucks under most free-float rails cleanly. The one thing to check is clearance for the gas switch lever, since very slim handguards may not leave room for it. If your rail is tight, you can still adjust the main gas screw with a long hex driver.
The only difference is the journal diameter that fits over your barrel. This .750" model matches the most common AR-15 barrel gas seat, while the .875" is sized for larger diameter barrels. Measure your barrel's gas block seat before ordering to be sure you get the right fit.
| UPC | 811452029651 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | 0011510065 |
| Product Type | Gas Block |
| Model | |
| Color | Black |
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