The Alex Pro Firearms MLR is an AR-style precision rifle chambered in 7mm PRC, built around a 24-inch Proof Research carbon fiber barrel. It uses billet upper and lower receivers, a 15.5-inch M-LOK handguard, and a rifle-length gas system with a Superlative Arms adjustable gas block. The rifle ships with a Lancer carbon fiber stock and a CMC single-stage trigger. 
 

Key Specifications 

• Brand: Alex Pro Firearms 
• Model: MLR 
• Caliber: 7mm PRC 
• Action: Semi Auto 
• Capacity: 5-round 
• Barrel Length: 24" 
• Barrel Material: Proof Research Carbon Fiber 
• Handguard: 15.5" M-LOK 
• Trigger: CMC 3.5 lb Single-Stage 
• Stock: Lancer Carbon Fiber, Black 
   

Detailed Features 

• Proof Research 24-inch carbon fiber barrel paired with a 15.5-inch M-LOK handguard for a lightweight, rigid build 
• Superlative Arms adjustable gas block on a rifle-length gas system for tuning recoil and reliability 
• Billet upper and lower receivers with a matched bolt carrier group and charging handle 
• CMC 3.5-pound single-stage flat trigger for a crisp, consistent pull 
• Lancer carbon fiber stock with an Ergo SureGrip, finished off with an Elite Series muzzle brake

Shooters running the APF MLR in 7mm PRC generally praise the fit and consistency of the billet receivers and the Proof Research carbon fiber barrel, noting the rifle feels tighter than many mass-produced AR builds. The CMC single-stage trigger draws consistent approval for a clean break, though a few owners mention it takes some dry-fire time to get used to after a two-stage setup.

Handling a magnum-class cartridge in an AR platform means recoil management matters, and owners like being able to fine-tune the Superlative Arms adjustable gas block rather than living with a fixed setting. The Lancer stock and Ergo grip get positive marks for a solid cheek weld, while the overall build stays lighter than a comparable steel-barreled rifle thanks to the carbon fiber barrel.

Value opinions split by budget: buyers who want a purpose-built precision AR in a magnum chambering see the price as reasonable for the parts involved, while others note that a standard aluminum-barrel build in the same caliber costs noticeably less. Aftermarket AR-pattern parts compatibility for the M-LOK handguard and stock is seen as a plus.