LBE Unlimited Pistol-Length Gas Tube — 304 Stainless Steel — AR-15 (Model ARGTP, UPC: 765857617541)
Upgrade your short-barrel AR-15 build with a rugged, corrosion-resistant gas tube engineered for reliable gas flow and repeatable cycling. The LBE Unlimited ARGTP Pistol-Length Gas Tube is precision-formed from 304 stainless steel to deliver long-lasting service in pistol-length gas systems, SBRs, and other compact AR-15 platforms where dependable gas timing matters most.
Overview
The gas tube is a small part that plays a big role in the function of any direct-impingement AR-15. The LBE Unlimited ARGTP is built to exacting tolerances from 304 stainless steel for superior corrosion resistance, consistent gas delivery, and strength under heat and repeated firing. Whether you’re assembling a pistol-length AR, converting to an SBR, or replacing a worn tube, this gas tube is a reliable drop-in option for builders and armorers.
Why 304 Stainless Steel Matters
Corrosion resistance: 304 stainless stands up to fouling, moisture, and harsh environments better than many plain carbon steels — ideal for shooters who train outdoors or store firearms in variable conditions.
Heat tolerance: The stainless construction resists warping and maintains dimensional stability under sustained fire.
Long life & easy maintenance: Smooth internal bore resists carbon buildup, and external surfaces clean easily for low-maintenance reliability.
Key Features
Model: ARGTP
UPC: 765857617541
Length: Pistol-length gas tube (designed for pistol/SBR gas port placement)
Material: 304 stainless steel — durable and corrosion-resistant
Finish: Natural stainless (polished/bright appearance)
Compatibility: Standard AR-15 pistol-length gas systems and gas blocks that accept a pistol-length tube
Construction: Precision formed and end-flared for reliable gas port alignment and secure roll-pin retention
Drop-In Replacement: Designed to be a simple swap for existing pistol-length gas tubes
Performance & Compatibility
The ARGTP is optimized for AR-15 uppers that use a pistol-length gas system (short gas tube length where the gas port is located close to the chamber). It works with typical .223/5.56 direct-impingement bolt carrier groups and standard gas block interfaces. Proper gas tube length is essential to correct gas-port timing — the ARGTP ensures you get the intended gas impulse for reduced dwell time and consistent cycling in compact builds.
Installation Notes
Safety first: Always clear the firearm and verify it is unloaded before performing any work.
Orientation & alignment: Insert the gas tube through the gas block and align the roll pin hole. Confirm correct orientation before pinning.
Roll pin installation: Use a proper roll-pin punch and vise or gas-block tool to drive the roll pin squarely; avoid yawing or hammering at odd angles that could damage the tube or block.
Gas block retention: Tighten set screws or clamp hardware per the gas block manufacturer’s specifications. Ensure the gas block is correctly timed to the gas port.
Function check: After installation, perform a function check and a short live-fire verification from a safe range to confirm proper cycling and gas pressure.
When in doubt: If you are unfamiliar with gas system timing or roll-pin installation, consult a qualified gunsmith or armorer.
Tuning & Troubleshooting
If your rifle is over-gassed (hard-recoiling, carrier velocity issues) or under-gassed (failure to cycle), inspection of the gas tube alignment, gas port condition, gas block seating, and gas port sizing is the first step.
Carbon build-up in the gas tube can affect cycling; periodic cleaning with appropriate brushes and solvents will preserve function.
Match your buffer, spring, and BCG weight to the gas system for best results with pistol-length configurations.
Ideal Uses
Pistol-length AR-15 builds and SBRs
Short-barrel rifles where compact gas timing is required
Builders replacing a worn or damaged gas tube with a corrosion-resistant upgrade
Users seeking stainless durability for training, duty, or harsh-environment use
Care & Maintenance
Periodically inspect the gas tube for carbon buildup, dents, or damage.
Clean the tube bore with appropriate brushes and solvent during routine maintenance.
Replace the gas tube if you detect deformation, cracks, or compromised roll-pin retention.
Why Choose the LBE Unlimited ARGTP?
Small part. Big impact. The LBE Unlimited ARGTP Pistol-Length Gas Tube pairs precision manufacturing with 304 stainless durability to give AR-15 pistol builders confidence that their gas system will perform consistently shot after shot. It’s a straightforward, high-value upgrade or replacement part for anyone building or maintaining compact AR platforms.
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