Aero Precision APRH101206C Low-Profile.875 AR15/AR 308 Black Nitride Steel

The Aero Precision low-profile .875 gas block is a direct-impingement rifle component designed for AR15 and AR308 platform builds. Built from hardened 4150 steel with a black nitride finish, this gas block delivers the durability and corrosion resistance you need whether you're on the range, in the field, or running suppressed. The low-profile design keeps your build clean and makes installation straightforward, while the black nitride coating handles hard use without flashy aesthetics getting in the way.

This gas block fits barrels with .875 outside diameter and uses steel set screws (10-32 x 3/16, knurled cup point) for secure attachment. Aero Precision machines and finishes these in the USA, so you're getting the same precision and consistency that goes into their upper and lower receivers. It's the kind of no-nonsense part that lets you focus on the build without worrying about fit or finish.

If you're assembling an AR15 or AR308 and want a gas block that matches the quality of your receiver set, this is a solid choice. The low profile won't interfere with rail systems or handguards, and the black nitride stands up to cleaning solvents and routine maintenance. Just note: a roll pin is not included, so factor that into your parts list.

Key Features

• Hardened 4150 steel construction with black nitride coating for corrosion resistance and durability
• Low-profile design for clean builds and easy fitment with rail systems
• Fits .875 OD barrels commonly found on AR15 and AR308 platforms
• Steel set screws (10-32 x 3/16) with knurled cup point for secure, repeatable seating
• Made in the USA

Specifications

Frequently Asked Questions

Will this gas block fit my AR15 or AR308 barrel?

This gas block is designed for barrels with a .875 outside diameter. If your barrel measures .625, .750, .825, or .936 OD, you'll need a different size gas block. Check your barrel specs before ordering.

Is a roll pin included?

No, the roll pin is not included. You'll need to source one separately as part of your build.

Can I use thread locker on the set screws?

Aero Precision does not recommend red (permanent) thread locker on the set screw threads. If you choose to use thread locker, use a non-permanent variety instead.

Is this made in the USA?

Yes, Aero Precision manufactures this gas block in the USA.