The Faxon Firearms Sentry-X in .223 Rem/5.56 NATO (MPN FX5216X) is part of Faxon’s Summit Line, built for training and defensive needs around a 16-inch black nitride barrel with a 1:8-inch twist. Faxon Firearms machines an enhanced forged X-Tra Lite receiver set with a tensioning screw, tightening up the fit between upper and lower for reduced rattle. The rifle carries an ambidextrous charging handle and safety selector, a Faxon trigger built by Rise Armament, and upgraded furniture including a 15-inch M-LOK handguard, a B5 Bravo stock, and a B5 Type 23 grip. Among AR-platform rifles in the AR rifles category, the Sentry-X favors shooters who want a Rise Armament trigger and tensioned receiver set in a defense-ready AR.

Key Specifications

• Chambered in .223 Rem/5.56 NATO with a 1:8-inch rate of twist.
• Built on a semi-automatic AR-15 platform.
• Features a 16-inch black nitride barrel.
• The receiver set is forged X-Tra Lite with a tensioning screw.
• Includes a Rise Armament trigger, built for Faxon.
• The safety is an ambidextrous lever.
• The handguard is a 15-inch M-LOK design.
• Fitted with a B5 Bravo stock and B5 Type 23 grip.
• Feeds from a detachable magazine with a 30-round capacity.

Frequently Asked Questions

What trigger does this rifle use? A Faxon trigger built by Rise Armament.

What makes the receiver set distinctive? A forged X-Tra Lite design with a tensioning screw to reduce upper-to-lower rattle.

What furniture does this rifle use? A B5 Bravo stock and B5 Type 23 grip.

Buy the Faxon Sentry-X .223/5.56

A Rise Armament trigger and tensioned receiver set in a defense-ready AR is exactly what the Sentry-X delivers. Order it from our Lubbock, Texas gun shop for fast, insured shipping to your FFL.