AR-15 Brn-180 Side-Folding Trapdoor Stock Black
$191.99 at Ammunition Depot · 6 stores
In stock
Best price
$153.99at Brownells
In stock Lowest in 30 dayschecked Nov 11, 2026
Where to buy
| Store | Price | Availability | Buy | Add to build |
|---|---|---|---|---|
| Brownells Best price | $153.99checked Nov 11, 2026 | In stock | Buy at Brownells | |
| GunMag Warehouse | $159.99checked Nov 7, 2026 | In stock | Buy at GunMag Warehouse | |
| OpticsPlanet | $164.95Salechecked Nov 11, 2026 | In stock | Buy at OpticsPlanet | |
| Ammunition Depot | $164.95checked Nov 11, 2026 | In stock | Buy at Ammunition Depot | |
| Battlehawk Armory | $125.10Salechecked Nov 11, 2026 | Check store | Buy at Battlehawk Armory | |
| Classic Firearms | $164.95checked Nov 11, 2026 | Check store | Buy at Classic Firearms | |
| GrabAGun | $164.95Salechecked Nov 12, 2026 | Check store | Buy at GrabAGun | |
| Palmetto State Armory | $164.99checked Nov 11, 2026 | Check store | Buy at Palmetto State Armory |
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: $153.99 at Brownells. Dashed line = out of stock. Tracking since Sep 27, 2026.
Show the prices as a table
| Store | Latest | Lowest | Highest |
|---|---|---|---|
| Ammunition Depot | $164.95 | $164.95 | $174.99 |
| Battlehawk Armory | $125.10 | $120.37 | $133.17 |
| Brownells | $153.99 | $153.99 | $153.99 |
| Classic Firearms | $164.95 | $164.95 | $164.95 |
| GrabAGun | $164.95 | $164.95 | $164.95 |
| GunMag Warehouse | — | $159.99 | $159.99 |
| OpticsPlanet | $164.95 | $164.95 | $164.95 |
| Palmetto State Armory | $164.99 | $164.99 | $164.99 |
Since Sep 27, 2026.
About this part
The Alpha Series M4 Beam Side Folder is an AR-15 stock from Midwest Industries. It's sold by 8 stores (4 in stock), from $125.10 to $164.99. The lowest in-stock price in the last 30 days was $153.99 at Brownells.
Specifications
- Manufacturer
- Midwest Industries
- Type
- Stock
- Platform
- AR-15
From the manufacturer
Adding to the line of Alpha Series Product, Midwest Industries now has Fixed Beam stocks in both a Side Folder and Fixed Picatinny Attachment model. Side Folder Specs: Heavy-duty side-folding mechanism constructed from 4140 steel Full-length locking lug for maximum strength Solid positive lock up in both positions Steel clamp with large surface engagement Can be configured to right or left folding Modular design can accommodate different stock attachments 2 QD Sling attachments Compatible with Mil-Spec diameter stocks Curved top to mitigate wobble from skeletonized beam Adds 7.0" to overall firearm length Adds 0 Mfg: Midwest Industries
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