Chapter 5 - THE METAL FRAGMENT
The range was completely silent now. Dozens of soldiers, range safety personnel, and brass collectors watched from behind the yellow line as Captain Reeves reached into his pocket and pulled out a tactical penlight.
He shone the bright LED beam straight into the upper receiver extension, right above the trigger group.
"Major," Daniel said quietly, his voice hollow. "Look at this."
Nathan, still breathing heavily with frustration, scoffed and leaned over the table. "It's grease, Reeves. It's factory storage grease—"
Nathan stopped talking.
Using the edge of a thin metal stylus from his clipboard, Daniel carefully reached into the narrow channel near the bolt carrier track. With extreme delicacy, he extracted a tiny object that had been wedged tightly behind the gas tube locking pin.
Tink.
The object dropped onto the polished stainless-steel table.
Everyone froze.
It was a tiny, precision-milled fragment of blackened titanium steel, no larger than a grain of rice, with two razor-sharp bevels along its edges. It was not a component of an M4A1 carbine. It did not belong in any standard-issue US military small arm.
Under the harsh Carolina sun, the metal fragment gleamed with an oily, iridescent sheen.
Nathan stared at the tiny object, his mouth opening slightly. The arrogant composure he had worn like armor for the last ten minutes evaporated instantly.
"What... what is that?" Nathan stammered, looking up from the table to Daniel, then slowly turning his gaze to Margaret. "Did a milling shaving get left in the receiver during manufacturing?"
Daniel’s face had gone completely pale. "No, sir. This isn't manufacturing debris. It's heat-treated titanium alloy. And it was intentionally placed where the bolt tail hits the buffer tube."
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Daniel looked up at Margaret with a mixture of profound respect and sudden terror.
"If this weapon had been fired in full-auto mode," Daniel whispered, "the bolt would have bound violently, sheared the receiver pin, and catastrophic failure would have occurred six inches from the shooter's face."
