- Product Code: 41039
Axem Gas Tube Kit Rifle Roll Pin SS is a spare and maintenance kit for the gas system of an AR-15 type firearm, which includes a rifle-length gas tube and a roll pin required for installation; the set is intended for direct impingement (DI) upper receivers and gas blocks of the AR-15/M16 platform. Column D indicates that this is a gas tube kit, and the information in column G, AR15 spare part, practically means a compatible spare part for the maintenance, construction, and replacement work of the AR-15 platform's gas system.
The rifle-length specification supports stable gas flow, and the stainless steel (SS) gas tube withstands use and cleaning. The standard outer diameter is 3.18 mm (0.125 in), making it compatible with AR-15 compatible gas blocks and the carrier's gas key part. The included roll pin is standard size 1/16 in (1.59 mm) and ensures mechanically secure attachment to the gas block without adhesives or special tools.
The structure's bend geometry is implemented according to the AR-15 standard, so that the gas tube aligns correctly under the handguard and receiver and does not bind moving parts. The stainless material reduces surface rust formation and facilitates carbon removal. The tube is intended for the direct impingement system of the AR-15 platform; not compatible with piston-type gas piston systems. The kit is suitable for both low-profile gas blocks and AR-15 gas blocks with front sight base (FSB) that have roll pin attachment.
Axem Gas Tube Kit Rifle Roll Pin SS - Features:
- Type: AR-15 rifle-length gas tube + roll pin (spare/maintenance kit)
- System: Direct impingement (DI), not piston
- Material: stainless steel (SS)
- Outer diameter: 3.18 mm (0.125 in)
- Length class: rifle-length (AR-15)
- Attachment: roll pin to gas block
- Roll pin: 1/16 in (1.59 mm) standard size
- Compatibility: AR-15/M16 platform gas blocks with roll pin attachment and 3.18 mm gas tube channel
- Compatible gas blocks: low-profile and FSB-type AR-15 gas blocks (with roll pin attachment)
- Purpose: maintenance, replacement of worn/bent gas tube, building a new upper receiver
- Serviceability: stainless surface facilitates carbon and dirt removal
Summary: the stainless steel rifle-length gas tube and standard-sized roll pin provide reliable gas flow and secure attachment to the AR-15 platform's DI system. The kit is dimensioned according to standards, so installation and compatibility with standard gas blocks and the carrier's gas key part are straightforward, and maintenance work proceeds without additional part acquisitions.
Usage recommendation: suitable for the maintenance, construction, and gas tube replacement of the AR-15 platform's rifle-length gas system when a stainless steel standard-sized tube with a roll pin is desired.
Product text updated 6.3.2026.
