Lbe Arlgb-Rblk Low Pro Gas Block W/Rfl Gastube

The LBE Unlimited low-profile gas block with rifle-length gas tube is a direct-impingement essential for AR-15 builds that demand reliable performance without excess bulk. Whether you're assembling a precision rifle, a lightweight hunting upper, or a competition gun, this gas block pairs a compact profile with a complete rifle-length gas tube—no separate sourcing required. Built and tested in the USA by LBE Unlimited, it's the kind of part that works quietly in the background so your rifle runs consistently.

A .750-inch steel gas block with nitride finish gives you corrosion resistance and hardness where it matters most. The rifle-length gas tube installed means you're ready to drop it into your upper receiver without guessing fitment or buying extras. LBE's commitment to domestic manufacturing and quality control means you're not gambling on mystery-origin hardware—every component is made and inspected to stand up to serious use, whether that's hunting, range time, or tactical training.

For builders who value simplicity and reliability, a complete gas block and tube assembly cuts assembly time and eliminates one more variable in your build. The low-profile design keeps your rifle sleek and won't interfere with most rail systems or sight mounts. Pair it with your choice of upper receiver, barrel, and handguard to build the rifle you actually want to shoot.

Key Features

• .750-inch diameter gas block—standard sizing for direct-impingement AR-15s
• Steel with nitride finish for durability and corrosion resistance
• Low-profile design minimizes interference with optics, rails, and accessories
• Rifle-length gas tube pre-installed and ready to go
• 304 stainless steel seamless tubing for strength and reliability
• Made in the USA by LBE Unlimited

Specifications

Frequently Asked Questions

Is this gas block compatible with my AR-15 barrel?

Yes, this .750-inch gas block is the standard size for direct-impingement AR-15 rifles. The rifle-length gas tube will fit standard upper receivers with rifle-length gas port spacing. Confirm your upper receiver is designed for rifle-length gas systems before ordering.

What's included—do I get the gas tube too?

Yes, the rifle-length gas tube comes pre-installed on this gas block, so you have everything needed to mount it directly to your upper receiver. No additional parts to source or assemble.

Why nitride finish instead of phosphate or bare steel?

Nitride provides superior corrosion resistance and surface hardness compared to traditional phosphate, making it ideal for both indoor and outdoor shooting. It's more durable under heavy use and holds up better in wet conditions.

Will this fit under my free-floating rail?

The low-profile design minimizes width and height, but gas block clearance depends on your specific handguard. Measure your rail's internal diameter and mounting surface before purchase to ensure compatibility.