The smell of gunpowder

[John Corbett]

AI Overview
Yes, an AR-15 (likely an early Colt Model 601 or 602) fired 6 times in 1963 would produce a distinct and likely strong, pungent, or acrid odor to anyone nearby.
While modern, high-quality ammunition is relatively clean, several factors in 1963 would make the scent intense.
Why It Would Smell Strongly in 1963
Lubricant Burn-off: Early AR-15s were often heavily treated with packing grease and, when in use, required generous lubrication (like LSA). Firing 6 rounds would heat the rifle, burning off this oil and grease, which creates a very pungent, hot oil smell.
Acrid Gunpowder: Early .223 ammunition utilized specific nitrocellulose propellants that produce a sharp, acrid odor (sometimes described as sulfurous) when burning.
Direct Impingement System: Because the AR-15 directs gases back into the action/bolt carrier group, that burnt powder smell and oil vapors are released near the shooter's face/upper body, making the smell more noticeable than in traditional rifles.
Factory Residue/Grease: New rifles in that era often arrived with thick, pasty protective grease designed for long-term storage, which "smokes" or smells intensely when first fired.

Contextual Factors
Ammonia Smell: Some early or slightly degraded ammunition from that era might produce a strong ammonia scent, especially if moisture was present in the powder, which can happen if the gun is fired shortly after removal from storage.
The "Burning Oil" Factor: If the weapon was heavily lubricated with CLP or LSA (common for military testing), the smell would be quite pungent, similar to "burnt oil + burning engine paint" or a "machine shop".

In summary, 6 shots of early 1960s ammo would be enough to create a distinct, pungent aroma that would linger in the immediate area.

Do you think the GK shooter fired 6 rounds?