KAK Industry Gas Tube Mid-Length Fits AR15 Silver - AR15-UP-172 - 811163030533
Product Description
Maintaining proper gas regulation, dwell time, and cycling reliability in a custom mid-length AR-15 barrel assembly requires a high-precision, heat-resistant gas tube. Worn, bent, or corroded gas tubes cause severe gas leakage around the gas block journal, resulting in failure-to-extract, short-stroking, or erratic bolt carrier travel. The KAK Industry Mid-Length Stainless Steel Gas Tube in Silver (AR15-UP-172) addresses cycling inconsistency and gas erosion by providing a heavy-duty, Mil-Spec dimensioned direct-impingement gas tube engineered for intense thermal cycles.
Precision-drawn from high-grade 304 stainless steel, the AR15-UP-172 features a nominal length of 11.75 inches designed specifically to mate with mid-length barrel gas ports. The raw stainless steel silver finish offers inherent resistance against extreme internal gas temperatures, carbon fouling, and environmental corrosion without chipping or flaking over high round counts. Both the gas block roll pin interface and gas key mushroom tip are machined to strict Mil-Spec tolerances, guaranteeing smooth entry into the upper receiver gas tube keyway without binding against the bolt carrier key.
Ideal for custom upper receiver builds, gas system overhauls, or barrel replacements on 14.5-inch and 16-inch mid-length AR-15 carbines, the KAK Industry AR15-UP-172 comes complete with a steel gas tube roll pin for straightforward, secure armorer installation.
*Armorer Bench Notes & Real-World Staging Guidance:
Fitment & Platform Compatibility Matrix: Fits standard Mid-Length AR-15 and AR-10 / LR-308 Barrel Assemblies utilizing a mid-length gas port position (~11.75" tube length). Compatible with standard 0.625", 0.750", and 0.875" gas blocks (low-profile or A2 front sight towers).
Installation Sequence:
- Safety check the firearm: clear magazine, lock bolt rearward, and physically/visually inspect chamber to verify clear weapon.
- Slide the rounded end of the KAK AR15-UP-172 gas tube through the front of the upper receiver gas tube port to verify alignment with the barrel nut.
- Insert the gas tube into your gas block, ensuring the gas port hole facing downward aligns with the internal port of the gas block.
- Secure the gas tube to the gas block using the included roll pin and a dedicated gas tube roll pin punch set.
- Slide the gas block and tube assembly onto the barrel journal, seat the rear end into the upper receiver keyway, and verify that the bolt carrier gas key slides over the gas tube tip without binding.
Key Features
- Mil-Spec Mid-Length Geometry: Engineered to exact 11.75-inch specs for seamless alignment with mid-length gas system barrels.
- 304 Stainless Steel Construction: High thermal threshold resists gas erosion, deformation, and high-volume firing stress.
- Natural Silver Finish: Raw stainless steel surface resists carbon buildup and provides excellent long-term corrosion protection.
- Precision Gas Key Mushroom Tip: Formed to match bolt carrier gas key entry, ensuring efficient gas seal without binding.
- Roll Pin Included: Ships with a heavy-duty steel gas tube roll pin for immediate assembly.
Product Specifications
- Brand: KAK Industry
- Model: Mid-Length Gas Tube
- MPN: AR15-UP-172
- UPC: 811163030533
- Platform Compatibility: AR-15 / AR-10 Mid-Length Gas Systems
- Gas System Length: Mid-Length (~11.75 inches)
- Material: 304 Stainless Steel
- Finish / Color: Natural Silver Stainless
- Included Components: Gas Tube, Gas Tube Roll Pin
