Hornady BLACK 5.56x45mm NATO 75 Grain Interlock HD SBR Ammo - 20 Rounds

Hornady BLACK 5.56x45mm NATO ammunition in 75 grain Interlock HD is engineered specifically for short-barreled rifles (SBRs) with barrels between 10.5" and 11.5". This round uses proprietary propellant technology and bullet design derived from Hornady's Critical Duty FlexLock line, delivering consistent performance whether your rifle runs suppressed or unsuppressed, direct impingement or piston-driven. If you run an SBR—whether for home defense, precision work, or duty use—this load is built to function reliably across your platform without the flash, fouling, or suppressor heat issues that plague standard 5.56 ammunition.

The 75 grain InterLock HD projectile is a jacketed soft point designed to expand reliably while maintaining integrity through intermediate barriers. Hornady engineered this round to meet FBI protocol standards, so you're getting ammunition tested to real-world defensive requirements. Velocity is uniform from shot to shot, which means tighter groups and more predictable bullet performance downrange. Because the load is optimized for shorter barrels, you won't sacrifice velocity or reliability—two critical factors when your SBR is your go-to rifle.

Every round is loaded with quality brass cases and matched primers, then proudly manufactured in the USA. Whether you're training, testing a new rifle build, or stocking a duty gun, you can trust Hornady BLACK to perform consistently. Each box contains 20 rounds.

Key Features

• Optimized for 10.5"–11.5" short-barreled rifle platforms
• 75 grain InterLock HD jacketed soft point projectile
75 grain InterLock HD jacketed soft point projectile
• Proprietary propellant formulation reduces flash and suppressor fouling
• Designed to meet FBI protocol standards
• Consistent velocity and accuracy across various rifle systems
• Performs reliably suppressed or unsuppressed
• USA-manufactured ammunition with quality brass and primers

Specifications

Frequently Asked Questions

Is this ammunition suitable for SBR and suppressed rifle use?

Yes. Hornady BLACK 75 grain Interlock HD is specifically designed for short-barreled rifles between 10.5" and 11.5", and the load produces minimal flash and suppressor fouling compared to standard 5.56 ammunition.

What bullet construction does this round use?

The round features a 75 grain InterLock HD jacketed soft point projectile, which is derived from Hornady's Critical Duty FlexLock technology and designed to provide controlled expansion while meeting FBI protocol performance standards.

Will this ammunition work in unsuppressed rifles or other platforms?

Yes. While optimized for 10.5"–11.5" SBRs, Hornady BLACK ammunition delivers reliable performance whether suppressed or unsuppressed, and across direct impingement, piston, bolt, and semi-automatic platforms.

How many rounds are in a box?

Each box contains 20 rounds of 5.56x45mm NATO ammunition.