The PTR GI PTR 100 is a semi-automatic rifle chambered in .308 Win with an 18" barrel, 20+1 capacity, and a Parkerized black finish on the receiver paired with a fixed OD Green synthetic stock. The 1:10" barrel twist handles .308 Win loads well out to typical hunting and range distances. At 9.5 lbs and 40.5" overall, it sits on the heavier end for an 18" .308. 
 

Key Specifications 

• Model: GI PTR 100 
• Caliber: .308 Win 
• Action: Semi-Automatic 
• Capacity: 20+1 rounds 
• Barrel Length: 18" 
• Barrel Twist Rate: 1:10" 
• Overall Length: 40.5" 
• Weight: 9.5 lbs 
• Finish: Black/OD Green (Parkerized) 
• Safety: Manual safety lever 
• Trigger: Standard 
• Grip: Standard polymer 
• Stock: Fixed OD Green synthetic 
• Sights: Adjustable iron sights 
   

Detailed Features 

 
The steel receiver with Parkerized finish handles weather and field use without the fuss of a polished finish. Adjustable iron sights come standard and are usable as-is, no optic required to get on paper. The .308 Win chambering handles medium to large game, and the 20+1 capacity gives you more rounds between reloads than most bolt guns in the same role. Semi-auto action means fast follow-up shots when you need them. 
 

Target Audience 

• Hunters who want a .308 semi-auto with iron sights and a durable field finish. 
• Shooters who want a high-capacity .308 for range use or competition. 
• Home defense buyers who want a larger-caliber semi-auto with a manual safety. 
   

Usage Scenarios 

• Hunting: 18" barrel and .308 Win give good reach for deer-sized game; the fixed stock and iron sights keep the setup simple in the field. 
• Range shooting: 20-round capacity cuts down on reload breaks during extended sessions. 
• Competition: Semi-auto action and 20+1 capacity work for .308 carbine events.

Owners of the PTR GI 100 in .308 Win tend to speak positively about build quality and reliability. The Parkerized steel construction is appreciated for holding up in varied conditions, and accuracy, particularly at longer ranges, gets consistent favorable mention. The .308 caliber is a draw for hunters and shooters who want meaningful stopping power.

The weight, 9.5 lbs, comes up in negative feedback fairly often, particularly from shooters who carry the rifle in the field. Some find the handling a bit bulky for extended use. Customization options and aftermarket part availability get discussed with mixed results, and experiences with PTR's customer service vary noticeably by account.

On value, opinions split: some feel the PTR GI 100 is fairly priced relative to its features and caliber, others point to competing .308 semi-autos at similar or lower price points. It tends to appeal most to buyers who prioritize durability and caliber performance over weight savings.

My PTR has been completely reliable and accurate. It feeds everything I have tried, while the matching furniture and overall fit and finish look right. The iron sights initially needed a major correction, but the proper sight tool brought them on target at 100 yards.