Luth-AR BL-03 Gas Tube Roll Pin 5/64" x .320" - 4340 Alloy Steel - AR-15

The Luth-AR BL-03 Gas Tube Roll Pin is a mil-spec replacement pin used to secure the gas tube to the gas block on an AR-15. Manufactured from hardened 4340 alloy steel with a black finish, this roll pin is the correct size to lock the gas tube in proper alignment over the gas port so the rifle cycles reliably. It is a direct-fit service part for any Luth-AR low-profile gas block install and also serves as a standard AR-15 gas-tube roll pin for any build or repair.

At 5/64" x .320", the BL-03 matches the factory-spec dimensions called for in Luth-AR's gas block installation procedure and is compatible with all standard AR-15 gas tube lengths. Whether you are assembling a new build, swapping a gas block, or replacing a lost or damaged pin during a field strip, this is the correct factory part from Luth-AR. Use a small roll-pin punch and a sturdy block to drive it evenly through the gas block and gas tube; once seated, the gas tube is locked in place and the system is ready to function.