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Armaspec
Overview
The Armaspec St45 Short Throw Ambidextrous Safety Selector features a 45° throw angle, allowing for a quick and efficient transition between safe and fire positions, which is particularly advantageous during high-stress situations. Its ambidextrous design accommodates both left and right-handed shooters, enhancing versatility on the range or in the field. This safety selector commonly appears in builds utilizing a carbine gas system and chambered in 5.56 NATO, making it a practical choice for various applications.
Armaspec ST45 Short Throw Ambidextrous Safety Selector Black ranked #76 of the 117 safety selectors builders added on GunPartPicker in August 2026. Builders have been adding it to their builds on GunPartPicker since January 2026. All time, it ranks #31 of the 222 safety selectors builders have added. Builds with this safety selector are split between .223 Wylde (50%) and 5.56 NATO (50%), nearly all on carbine-length gas, 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 8 retailers we track have it in stock. The best price crept up from $32.16 to $35.99 over August 2026. Buying today, the lowest price is $35.99 at Brownells, above August's low of $32.16, so a better deal may come back.
Updated · from real builds on GunPartPicker · Prices checked · refreshed daily across 35 retailers
We ranked every safety by how often it shows up in real builds on GunPartPicker.
Read the guide: AR-15 Safety Selector Guide →The part most often added in each category by the 44 builds that include this one
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Aggregated and anonymized data showing how builders use this product
Builds in the community that include the Armaspec St45 Short Throw Ambidextrous Safety Selector Black
| Build | Parts | Total |
|---|---|---|
 | 16 | $1412.26 |
 | 26 | $5778.05 |
 | 19 | $672.32 |
 | 24 | $3276.12 |
 | 22 | $1225.22 |
 | 19 | $1117.14 |
2 global ratings
Top reviews
Coming from a 90 degree selector the ST45 is a real improvement for fast manipulation. Both sides line up perfectly which not all ambi selectors do. The detent click is sharp but not loud. Fits any standard mil spec lower without modification.
45 degree short throw saves a fraction of a second on the safety sweep. ambi paddles are sized correctly. one nit, the anodize on mine had a slight matte vs satin shift between paddles, only visible side by side. function is correct
