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Spike's Tactical
Overview
The Spike's Tactical Flat Top Upper is a stripped upper receiver designed specifically for the AR-9 platform, accommodating 9mm caliber builds. Its flat top design allows for easy mounting of optics and accessories, while the 7075-T6 aluminum construction ensures durability without adding unnecessary weight. This upper is commonly used in blowback gas system builds that prioritize reliability and performance in 9mm configurations.
Spike's Tactical Flat Top Upper w/ Ejection Port Door, 9MM, Black - SFT902D
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Spike's Tactical Flat Top Upper w/ Ejection Port Door, 9MM, Black - SFT902D ranked #31 of the 690 upper receivers builders added on GunPartPicker in August 2026, behind the PSA 10.5" Pistol Length 300AAC Blackout 1:8 Nitride 9" Lightweight M-LOK Freedom Upper With BCG & CH, with about 1 in every 250 upper receivers added to builds. Up from #36 in July. Builds with this upper receiver are nearly all chambered in 9mm, mostly on blowback gas (75%, then mid-length 25%), and nearly all AR-9.
It was hard to find in August 2026, in stock on only 6 of the 21 days we checked, and today 2 of the 4 retailers we track have it in stock. The best price crept up from $103.50 to $112.99 over August 2026. Buying today, the lowest price is $103.50 at KY Gun Company, 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 upper receiver by how often it shows up in real builds on GunPartPicker.
Read the guide: Most Popular AR-15 Upper Receivers →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 Spike's Tactical Flat Top Upper w/ Ejection Port Door, 9MM, Black - SFT902D
| Build | Parts | Total |
|---|---|---|
 | 11 | $1516.94 |
 | 14 | $1479.82 |
 | 14 | $1087.85 |
 | 16 | $1576.48 |
 | 18 | $737.15 |
 | 12 | $960.64 |
 | 10 | $1589.61 |
1 global rating
Top reviews
Needed a stripped upper for a new 9mm PCC build and this Spike's Tactical flat top was just what the doctor ordered. The 7075-T6 aluminum feels super sturdy but its still lightweight. My optic mounted up perfectly, no issues at all. Great quality for the money, happy with this purchase.
