Does the Spike's Tactical Spikes Tactical M4 work with the FAXON Firearms URSSB762P ARAK-21 Upper?
Lower Receiver
Spike's Tactical Spikes Tactical M4
from $274.99
Upper Receiver
FAXON Firearms URSSB762P ARAK-21 Upper 7.62x39mm
from $861.99
Spike's Tactical lower and Faxon Firearms upper compatibility
Yes, they fit
The Spike's Tactical Spikes Tactical M4 works with the FAXON Firearms URSSB762P ARAK-21 Upper 7.62x39mm. Our compatibility rules found no conflict between them.
No one has built this exact setup yet, but Spike's Tactical lowers with Faxon Firearms uppers are a common pairing.
Counted from real GunPartPicker builds: parts lists people put together while planning to buy.
Checked by the same rules the AR builder runs on every part you add: caliber, frame size, receiver pattern, thread pitch and gas length.
Fit is judged from the specs retailers list, which can be missing or wrong. Confirm with the manufacturer before you buy, and have a qualified gunsmith check any build before you fire it.
How often builders pair the Spike's Tactical lower and Faxon Firearms upper
Backed by tens of thousands of qualified builds that have both a lower and an upper.
Share of builds with the Spike's Tactical Spikes Tactical M4 and any upper
Spike's Tactical Spikes Tactical M4
- Of lower picks
- 0.3%
- Median paid
- $275
FAXON Firearms URSSB762P ARAK-21 Upper
Not in enough builds yet to report.
How we count ⌄
These shares come from GunPartPicker's build data: real parts lists people put together while planning a purchase, not sales or surveys. A build counts a part only when it is the final pick for its slot, so parts that were swapped out never count. Fit never comes from these numbers; it comes from our compatibility rules alone.
Frequently built with the Spike's Tactical lower and Faxon Firearms upper
The part builders pick most often in each slot alongside these two, checked against both. Parts that conflict are left out.
Charging Handle
Aero Precision Breach Small Levers
Fits both
Bolt Carrier Group
Fits, check note
Stock & Brace
Spike's Tactical Spikes vs FAXON Firearms URSSB762P: specs and prices
| Spike's Tactical Spikes | FAXON Firearms URSSB762P | |
|---|---|---|
| Best price | $293.22 at BattleHawk Armory | $861.99 at Sportsmans Outdoor Superstore |
| Stores | 2 of 4 in stock | 0 of 5 in stock |
| Assembly | Complete | Complete |
| Platform | AR-15 | AR-15 |
| Caliber | 5.56 NATO | 7.62x39mm |
| Trigger Pin | .154 | n/a |
| Finish | Hardcoat Anodized | n/a |
| Color | Matte Black | n/a |
| Weight | 1.94 | n/a |
Both for $1155.21 at today's best prices.
Today's best prices and 90 day price history
Every store we track for each part, cheapest in stock first. Prices are checked through the day.
Spike's Tactical Spikes Tactical M4
Price history, last 90 days
- Spike's Tactical Spikes Tactical M4: lowest $283.50 on Jul 6, highest $342.99 on Jul 12 over the last 90 days.
- FAXON Firearms URSSB762P ARAK-21 Upper: lowest $855.60 on Jul 5, highest $920.00 on Jul 31 over the last 90 days.
Upper Receivers frequently paired with the Spike's Tactical Spikes Tactical M4
Most picked next to it in real builds. Only parts our rules say fit the Spike's Tactical Spikes Tactical M4 are listed.
Lower Receivers most paired with Faxon Firearms uppers
The FAXON Firearms URSSB762P ARAK-21 Upper is not in enough builds yet, so these are the most picked next to any Faxon Firearms upper. Only parts our rules say fit the FAXON Firearms URSSB762P ARAK-21 Upper are listed.
