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Seekins Precision
Overview
The Seekins Precision Select Adjustable Gas Block is designed for builders who want to fine-tune their gas system. With its adjustable feature, you can precisely control gas flow to optimize cycling for various ammunition types or suppressor use. The low-profile design and clamp-on mounting make it easy to install on a .750 diameter barrel, ensuring a secure fit without adding unnecessary bulk. This gas block is commonly found in mid-length gas system builds chambered in 5.56 NATO, providing flexibility and performance for a variety of shooting applications.
Seekins Precision Select Adjustable Gas Block - .750" ranked #28 of the 75 gas blocks builders added on GunPartPicker in August 2026. Builders have been adding it to their builds on GunPartPicker since February 2026. All time, it ranks #20 of the 177 gas blocks builders have added. Builds with this gas block are mostly chambered in 5.56 NATO (67%, then 6mm ARC 33%), split between carbine-length (50%) and mid-length (50%) gas systems, and nearly all AR-15.
Availability is good: it was in stock at one retailer or another nearly every day in August 2026, and today all 4 retailers we track have it in stock. Prices barely moved in August 2026, holding around $114, so there haven't been real sales lately. Buying today, the lowest price is $114 at Optics Planet, which matches the best price we saw in August.
Updated · from real builds on GunPartPicker · Prices checked · refreshed daily across 35 retailers
We ranked every gas block by how often it shows up in real builds on GunPartPicker.
Read the guide: AR-15 Gas Block Guide →Check it against the live catalog:
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Aggregated and anonymized data showing how builders use this product
Builds in the community that include the Seekins Precision Select Adjustable Gas Block - .750"
| Build | Parts | Total |
|---|---|---|
 | 21 | $1300.77 |
 | 25 | $4821.28 |
 | 11 | $1844.88 |
 | 19 | $1652.82 |
 | 27 | $3945.26 |
 | 17 | $6764.96 |
 | 24 | $1732.29 |
 | 28 | $3518.58 |
2 global ratings
Top reviews
Seekins Precision Select adjustable gas block in .750 drops in to a standard mil-spec barrel. The select adjustment has crisp detent positions for tuning. Steel construction holds up to heat. Solid quality adjustable gas block.
select adjustable .750 gas block, dialed it on a 14.5 mid length and got lock back elimination at about 11 clicks from full open. the locking detent click is positive, setting holds under sustained fire. seekins quality at fair pricing
