Single spiral of spring steel loops around the bolt three times and leaves no path for gas leakage. Replaces conventional three-piece “piston ring”-style sets that can accidentally line up, causing a major leak from the gas expansion chamber in the carrier.
NBS AR-15/M16 Helical Gas Ring - P6-00232
$3.95
Only 4 left in stock: 4 in Bakersfield - CA, 0 in Raleigh - NC