The Nosler M21 is a bolt-action rifle chambered in .308 Winchester with a black finish. It has a 22-inch barrel with a 1:10" twist, 41.7-inch overall length, and 6.80 lb weight. The design prioritizes accuracy and field durability. 
 

Key Specifications 

• Caliber: .308 Win 
• Model Name: M21 
• Brand: Nosler 
• MPN: 40721 
• UPC: 054041407212 
• Finish: Black 
• Safety: Lever Safety 
• Trigger: TriggerTech Field Model 
• Grip: Standard 
• Stock Material: All-weather Epoxy 
• Weight: 6.80 lbs 
• Sights: Integrated Base 
• Overall Length: 41.7" 
• Barrel Twist Rate: 1:10" 
• Barrel Length: 22" 
• Capacity: 4+1 rounds 
• Action Type: Bolt Action 
   

Detailed Features 

1. Barrel Design: 
   The barrel has a recessed crown and a threaded muzzle for suppressor or brake attachment. The 1:10" twist is appropriate for the full range of .308 projectile weights. 
    
2. TriggerTech Field Trigger: 
   Uses frictionless release technology for a clean, consistent break without the creep common in factory triggers. Most shooters find it usable without modification. 
    
3. All-Weather Epoxy Stock: 
   The stock resists moisture and temperature changes and doesn't add appreciable weight. 6.80 lbs loaded is manageable in the field. 
    
4. Self-Indexing Recoil Lug: 
   Keeps the action properly aligned in the stock during repeated firing, which supports consistent accuracy. 
    
5. Integrated Optics Base: 
   The receiver has a built-in mounting system; no separate rail needed to get a scope on the rifle.

The Nosler M21 in .308 Win gets favorable treatment from precision-oriented shooters and hunters, with a couple of recurring criticisms.

Accuracy is the main selling point in most discussions. Owners report solid groups with quality .308 loads, and the TriggerTech trigger gets consistent credit for a factory trigger that doesn't need replacement. Build quality comments are generally positive. The all-weather stock holds up and the overall fit and finish meets expectations at this price tier.

The ergonomics draw positive comments too. The stock balances well and the rifle handles comfortably during long sessions at the bench or on a hunt. Trigger pull is smooth and adjustable enough for most shooters without aftermarket work.

The price point is the most common complaint. Some buyers feel the M21 costs more than competing .308 bolt guns that offer similar accuracy, and a few mention that Nosler's customer service has been inconsistent. Neither issue seems to be a dealbreaker for most, but they come up often enough to note.

Overall the rifle has a strong reputation in the precision hunting segment for .308.