Product Description
A gas tube is essntial for AR-15-pattern firearms to carry hot gases back to the bolt carrier group.
What length of gas tube do I need?
Take your barrel and measure the distance from the breech end overall to the gas block shoulder, in inches. Look up this number on the chart below.
| Distance to gas block shoulder | Gas tube size |
| 3 3/4" | 5.8" (AR-15 Short pistol) |
| 4 5/8" | 6.75" (AR-15 Pistol) |
| 7 7/8" | 9.75" (AR-15 Carbine) |
| 9 7/8" | 11.75" (AR-15 Midlength) |
| 11 3/4" | 13 5/8" (AR-15 Intermediate) |
| 13 1/4" | 15.125" (AR-15 Rifle) |
Features: Weight varies from 10g to 28g depending on lengthYou get: (1) gas tube of the chosen length You need to get separately: (1) Gas tube roll pin (usually comes with the gas block) Compatible with: Standard AR-15/M16 gas blocks (regardless of barrel diameter) AR-15/M16 Barrels regardless of caliber Standard upper receivers Mil spec gas keys on BCG Mill spec and free float barrel nuts Mill spec gas tube roll pins Tools required: It may help to have some needle-nose pliers or a pin punch to drive in the Gas Tube Roll Pin. Installation Tips: One easy way is to get a starter punch and simply wiggle it into the gas block by hand until the punch bottoms out, then switch to a roll pin (nipple ended) punch. If you are replacing a Gas Tube, we recommend installing a new Roll Pin for factory-fresh retention strength.
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Great product
Good price and works well. I recently learned how nice having a stainless pin is.
