AR-15 / M4 Empty Rifle Chamber Block

AR-15 / M4 Empty Rifle Chamber Block

High-heat safety. Instant visual confirmation. Built for real range use.

The Bull Craft Industries AR-15 / M4 Empty Rifle Chamber Block provides fast, unmistakable visual confirmation that a rifle has been rendered safe. Designed for AR-15 and M4-style platforms, it gives shooters, instructors, and Range Safety Officers an easy way to identify cleared rifles during cold-range conditions, training, competition, and general range use.

Unlike basic chamber flags or low-temperature printed blocks, ours is manufactured from high-heat-resistant material designed to withstand the heat of a freshly fired rifle and long days at the range without warping or melting.

Inserted through the magazine well with the bolt locked to the rear, the block creates a highly visible indication that the rifle is in a safe condition. When the RSO calls a cold range, there’s no guessing which rifles have been cleared — your RSO will thank you.

The extended base at the bottom of the magazine well also provides a stable surface that allows the rifle to stand upright, making it especially useful for display, storage between stages, training environments, and organized range use.

Features

✅ High-Heat Resistant – Designed to handle freshly fired rifles and extended range sessions without warping or melting

✅ Immediate Visual Safety Indicator – Quickly identify rifles that have been rendered safe during cold-range conditions

✅ AR-15 / M4 Compatible – Designed for .223/5.56 AR-15 and M4-style rifle platforms

✅ Magazine-Well Installation – Installs quickly with the bolt carrier locked to the rear

✅ Upright Support Base – Extended bottom provides a stable platform that allows the rifle to sit upright

✅ Ideal for Range & Training Use – Excellent for shooting ranges, competitions, training environments, classes, and firearm displays

✅ Paintable Surface – Material accepts paint well for departments, teams, ranges, or individuals wanting high-visibility or custom colors

✅ Black Standard Finish – Standard production blocks are dyed black

✅ Grey Available by Request – Can be supplied undyed in grey for customers who intend to paint their own high-visibility color

Built for the Range

A safety device should be obvious, durable, and dependable. The Bull Craft Empty Rifle Chamber Block gives shooters and RSOs a clear visual indicator while standing up to the heat and abuse that comes with actual range use.

Engineered. Manufactured. Proven.