KAK K-SPEC Low Mass AR15 BCG Dual Ejectors Down Vent Sand Cuts
$80.99 at Ammunition Depot · 6 stores
In stock
Best price
$63.00at Kentucky Gun Co
In stock checked Oct 21, 2026
Where to buy
| Store | Price | Availability | Buy | Add to build |
|---|---|---|---|---|
| Kentucky Gun Co Best price | $63.00checked Oct 21, 2026 | In stock | Buy at Kentucky Gun Co | |
| GunMag Warehouse | $63.99checked Oct 21, 2026 | In stock | Buy at GunMag Warehouse | |
| Ammunition Depot | $67.99checked Oct 21, 2026 | In stock | Buy at Ammunition Depot | |
| Brownells | $69.99checked Oct 21, 2026 | In stock | Buy at Brownells | |
| OpticsPlanet | $71.59Salechecked Oct 21, 2026 | In stock | Buy at OpticsPlanet | |
| Battlehawk Armory | $59.76Salechecked Oct 21, 2026 | Check store | Buy at Battlehawk Armory | |
| Palmetto State Armory | $63.99Salechecked Oct 21, 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: $63.00 at Kentucky Gun Co. Dashed line = out of stock. Tracking since Sep 27, 2026.
Show the prices as a table
| Store | Latest | Lowest | Highest |
|---|---|---|---|
| Ammunition Depot | $67.99 | $67.99 | $67.99 |
| Battlehawk Armory | $59.76 | $57.02 | $59.76 |
| Brownells | $69.99 | $69.99 | $69.99 |
| GunMag Warehouse | $63.99 | $63.99 | $63.99 |
| Kentucky Gun Co | $63.00 | $63.00 | $63.00 |
| OpticsPlanet | $71.59 | $71.59 | $71.59 |
| Palmetto State Armory | $63.99 | $63.99 | $63.99 |
Since Sep 27, 2026.
About this part
The AR-15 NiB-X Complete Bolt is a 300 Blackout bolt carrier group from WMD Guns. It's sold by 7 stores (5 in stock), from $59.76 to $71.59. The lowest in-stock price in the last 30 days was $63.00 at Kentucky Gun Co.
Fits and works with
- Caliber
- 300 Blackout · Shop matching ammo
- Bolt
- Standard AR-15 (5.56 / 300 BLK / .350 Legend) · Bolt carrier groups
Specifications
- Manufacturer
- WMD Guns
- Platform
- AR-15
- Caliber
- 300 Blackout
- Finish
- Nickel Boron
- Material
- Polymer
From the manufacturer
Nickel Boron exterior gives this bolt an incredibly hard finish that protects against wear and corrosion for the ultimate in durability. The extreme smoothness and built-in lubricity of the coating also reduces friction and gives carbon deposits nowhere to stick, so bolt can be easily wiped clean with a cloth or nylon brush. Comes complete with ejector, extractor, and gas rings installed. Mfg: Wmd Guns SPECS: Carpenter 158 steel, NiB-XA(R) coating. Ejector, extractor, and gas rings included. Fits .223 5.56mm, 300 AAC Blackout, and similar AR platforms.
Similar bolt carrier groups
Small Caliber Solus Bolt Head Parts Kit
$40.99 at MidwayUSA · 3 stores
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