AR-15/M4 Receiver Extension
$66.50 at Brownells · 5 stores
In stock
Best price
$62.99at Ammunition Depot
In stock checked Oct 12, 2026
Where to buy
| Store | Price | Availability | Buy | Add to build |
|---|---|---|---|---|
| Ammunition Depot Best price | $62.99checked Oct 12, 2026 | In stock | Buy at Ammunition Depot | |
| OpticsPlanet | $66.49Salechecked Oct 21, 2026 | In stock | Buy at OpticsPlanet | |
| Battlehawk Armory | $57.50checked Oct 12, 2026 | Check store | Buy at Battlehawk Armory | |
| Palmetto State Armory | $63.99checked Oct 11, 2026 | Check store | Buy at Palmetto State Armory | |
| Brownells | $57.50checked Oct 21, 2026 | Out of stock | Buy at Brownells |
Prices and availability change often, so confirm on the store's site before you buy. We may earn a commission from these links.
Price history
Lowest in-stock price in the last 30 days: $59.99 at OpticsPlanet. Dashed line = out of stock. Tracking since Sep 28, 2026.
Show the prices as a table
| Store | Latest | Lowest | Highest |
|---|---|---|---|
| Ammunition Depot | — | $62.99 | $62.99 |
| Battlehawk Armory | — | $55.32 | $57.50 |
| Brownells | $57.50 | $57.50 | $57.50 |
| OpticsPlanet | $66.49 | $59.99 | $66.49 |
| Palmetto State Armory | — | $63.99 | $63.99 |
Since Sep 28, 2026.
About this part
The .308 AR Receiver Extension is an AR-10 buffer part from Forward Controls Design. It's sold by 5 stores (2 in stock), from $57.50 to $66.49. The lowest in-stock price in the last 30 days was $59.99 at OpticsPlanet.
Specifications
- Manufacturer
- Forward Controls Design
- Type
- Buffer Tube
- Platform
- AR-10
From the manufacturer
RE5F is a 9 position 308 AR compatible receiver extension (RE), it is also compatible with Vltor's splendid A5. RE5F is a collaboration with SOLGW, and is identical to Sons of Liberty Gunworks Loyal 9 A5 RE save for the respective company logo/name engravings. Forward Controls had contributed design input (extra drain holes and softening of sharp corners), there was nothing else FCD deemed a receiver extension could do better or needed to be improved on, so Loyal 9 / RE5F may look like other REs but with ergonomics and sensible changes, they're made for work, not for show. RE5F is compatible with 308 ARs and Vltor's A5 system. For AR15/M16 applications, it must use Vltor Mfg: Forward Controls Design
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