Atomic Ammunition Cycling Defense AD77 5.56x45mm NATO 77 grain Boat Tail Hollow Point Brass Cased Rifle Ammo 20 Rounds
No ratings yetBest price
$35.49at OpticsPlanet
Out of stock Sale checked Nov 10, 2026
In stock now instead
- Match Grade JHP 223 Remington 73gr Boat Tail Target 20/Box $35.43at Kentucky Gun Co
- Global Ordnance 5.56x39mm 55 gr FMJ 30rds $34.99at OpticsPlanet
- Barnes Precision Match 5.56x45mm NATO 69gr OTM Boat Tail 20/Box $34.44at Kentucky Gun Co
Where to buy
| Store | Price | Availability | Buy | Add to build |
|---|---|---|---|---|
| OpticsPlanet | $35.49Salechecked Nov 10, 2026 | Out of stock | Buy at OpticsPlanet |
Prices and availability change often, so confirm on the store's site before you buy. We may earn a commission from these links.
Similar ammunition in stock
This part is out of stock at every store we track. These similar ammunition are in stock, with today's prices.
Match Grade JHP 223 Remington 73gr Boat Tail Target 20/Box
$35.43 at Kentucky Gun Co · 10 stores
In stock
Global Ordnance 5.56x39mm 55 gr FMJ 30rds
$34.99 at OpticsPlanet · 4 stores
In stock Sale
Barnes Precision Match 5.56x45mm NATO 69gr OTM Boat Tail 20/Box
$34.44 at Kentucky Gun Co · 10 stores
In stock
Barnes Precision Match .223 Remington 55 gr OTM BT 20rds
$34.44 at Kentucky Gun Co · 8 stores
In stock
Buffalo Bore 223 Rem/5.56x45mm 55 grain Ballistic Tip Rifle Ammo, 20/Box
$34.21 at Kentucky Gun Co · 8 stores
In stock
Buffalo Bore 223 Rem/5.56x45mm 69 grain Jacketed Hollow Point Rifle Ammo, 20/Box
$34.21 at Kentucky Gun Co · 6 stores
In stock
Price history
Dashed line = out of stock. Tracking since Nov 5, 2026.
Show the prices as a table
| Store | Latest | Lowest | Highest |
|---|---|---|---|
| OpticsPlanet | $35.49 | $35.49 | $35.49 |
Since Nov 5, 2026.
About this part
The Atomic Ammunition Cycling Defense AD77 5.56x45mm NATO 77 grain Boat Tail Hollow Point Brass Cased Rifle Ammo 20 Rounds is a 5.56 / .223 ammunition from Atomic Ammunition. One store lists it, OpticsPlanet at $35.49.
Fits and works with
- Caliber
- 5.56 / .223 · Shop matching ammo
Specifications
- Manufacturer
- Atomic Ammunition
- Caliber
- 5.56 mm NATO
- Bullet weight
- 77 gr
- Casing
- Brass
From the manufacturer
Atomic Ammunition Cycling Defense AD77 5.56x45mm NATO 77 grain Boat Tail Hollow Point Brass Cased Rifle Ammo 20 Rounds. 56 NATO 77gr Cycling HP BT defensive round built on the 77gr OTM profile that set the standard for 5.56 terminal performance. Purpose-built for home defense duty carry and 3-Gun delivering sub-MOA accuracy superior terminal effect and better barrier performance than standard ball ammunition. The AD77 is Atomics purpose-built 77gr OTM (Open Tip Match) defensive load for the AR-15 platform. The 77gr boat tail profile is the benchmark for precision 5.56 engagement selected for its superior accuracy terminal effect and barrier performance over standard 55gr and 62gr ball ammunition. Atomic loads it to a higher standard. Every AD77 round is built with new-production brass match-grade 77gr HP BT projectiles and precision-weighed powder charges inspected for the tight tolerances required to deliver sub-MOA accuracy and consistent 2750 fps muzzle velocity across every lot. Heavier bullet higher ballistic coefficient. That means less wind drift more energy retained at distance and effective terminal performance out past 600 yards. The hollow point boat tail provides controlled expansion while reducing deflection through intermediate barriers like drywall and auto glass. The 77gr OTM isnt new its the spec that proved what 5.56 could do when loaded right. The AD77 is Atomics answer to how it should be loaded. Built for: Home defense duty carry and 3-Gun competition. Optimized for 1:7 and 1:8 twist barrels. Specifications for Atomic Ammunition Cycling Defense AD77 5.56x45mm NATO 77 grain Boat Tail Hollow Point Brass Cased Rifle Ammunition: Manufacturer: Atomic Ammunition Caliber: 5.56x45mm NATO Bullet Type: Boat Tail Hollow Point (BTHP) Bullet Weight: 77 grain Cartridge Case Material: Brass Muzzle Velocity: 2750 ft/s Muzzle Energy: 1294 ft-lbs Application: Self-Defense Package Contents: Atomic Ammunition Cycling Defense AD77 5.56x45mm NATO 77 grain Boat Tail Hollow Point Brass Cased Rifle Ammunition What is Atomic Ammunition Cycling Defense AD77 5.56x45mm NATO 77 grain Boat Tail Hollow Point Brass Cased Rifle Ammunition good for? The manufacturer suggests that it is suitable for self-defense.Atomic Ammunition CART-556-77GR-HPBT-DEF-20: Cycling Defense AD77 5.56x45mm NATO 77 grain Boat Tail Hollow Point Brass Cased Rifle Ammo 20 Rounds
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