ONE 5.56 MM ELP SNS NICKEL SPIKE CARTRIDGE. HEADSTAMP WINCHESTER 223 REM. 40g. SNS (Short Nickel Spike) projectile uses old-school screwed technology providing that little added penetration. Because of specialized Product Engineering this projectile for a more affordable spike, and is NOT designed to separates on impact like it’s brother spikes to control those short range Varmints and Predator hiding in the burn pile logs in the woods.