# PTR GI 100 .308 Win Semi-Auto Rifle - Precision Performance 18" **Brand:** PTR **Category:** Semi-Automatic Rifles **Caliber:** .308 Win ## Specifications - **Caliber:** .308 Win - **Barrel Length:** 18" - **Capacity:** 10 rounds - **Finish:** Black - **Weight:** 152 oz - **UPC:** 897903002619 - **SKU:** UCFo6HUbr ## Description The PTR GI 100 is a semi-automatic rifle chambered in .308 Win, built on a roller-delayed blowback design derived from the HK G3/CETME platform. The 18" tapered barrel has a 1:10" twist and a threaded muzzle at 1/2"-28 tpi. The parkerized black finish pairs with a classic green stock. It weighs 9.50 lbs. and holds 10+1 rounds. ### Key Specifications - **Caliber:** .308 Win - **Barrel Length:** 18 inches - **Capacity:** 10+1 rounds - **Weight:** 9.50 lbs - **Finish:** Black Parkerized / Classic Green stock - **Action Type:** Semi-Auto - **Manufacturer:** PTR - **Model Number:** GI 100 ### Features The roller delayed blowback system is the defining mechanical characteristic. It's the same operating principle as the original G3, which means parts geometry follows that legacy design. The 18" barrel is shorter than the standard G3 length, which reduces overall size while the 1:10" twist handles standard .308 Win projectiles well. The 1/2"-28 tpi threaded muzzle adds suppressor or muzzle device compatibility. The fixed stock keeps the platform simple and stable. ### Use Cases This is a .308 Win semi-automatic built for shooters who want the G3/HK91 roller-delayed platform at a domestic price point. It works for hunting medium and large game, precision range work at .308 distances, and general sporting use. The threaded muzzle opens it to suppressor use for hunters and range shooters who run cans. ## Frequently Asked Questions **Q: What caliber is the PTR GI 100?** A: The GI 100 is chambered in .308 Win. **Q: Who makes the GI 100?** A: The GI 100 is made by PTR. **Q: What type of firearm is the PTR GI 100?** A: It is a semi-automatic rifle built on a roller-delayed blowback design. **Q: What is the barrel length of the GI 100?** A: The barrel is 18 inches long with a 1:10" twist. **Q: How many rounds does the GI 100 hold?** A: It has a 10+1 capacity. **Q: Is the PTR GI 100 threaded?** A: Yes, the muzzle is threaded at 1/2"-28 tpi. **Q: Where can I buy the PTR GI 100?** A: Compare current vendor offers on this page. ## What Reviewers Say *Quoted verbatim from YouTube reviews. Each link opens the video at the moment quoted.* > It's definitely the worst trigger. I mean, for me, that's an unacceptable trigger, even as a battle rifle. The trigger is like doing curls for your fingers. > > — [Misha’s Guns](https://www.youtube.com/watch?v=nLhIHUaUwcY&t=450s) > No, look. For 200 yd, this is what's expected to of a battle rifle. > > — [Misha’s Guns](https://www.youtube.com/watch?v=nLhIHUaUwcY&t=440s) > One of my favorite things about this gun is it's unique operation. So, it's one of the very few widely adopted guns out there to use something called a roller delayed blowback system. > > — [Misha’s Guns](https://www.youtube.com/watch?v=nLhIHUaUwcY&t=233s) > I heard PTR actually use his old Portuguese tooling to make their rifles. It's real OG stuff here. It's real OG stuff, but 100% built in America, but a very faithful clone of the original configuration G3 rifle. > > — [Misha’s Guns](https://www.youtube.com/watch?v=nLhIHUaUwcY&t=117s) ## What Customers Say *AI-generated insights from customer reviews* PTR GI 100 owners generally come from a specific corner of the market, people who want the G3/HK91 roller-delayed .308 platform and don't want to pay HK import prices. For that buyer, satisfaction is typically high. Build quality gets consistent praise: the rifles feel solid and the construction meets expectations for a US-made G3 derivative. Accuracy feedback on the 18" barrel is positive. Owners report good performance at typical .308 distances, and the recoil management from the roller delayed system is frequently noted as a positive compared to gas-operated .308 platforms. The criticisms fall into a few consistent buckets. Weight at 9.50 lbs. is a real factor. It's heavy for a general-purpose rifle, and a few users find it tiring during extended field carry. Ergonomics get mixed marks; the fixed stock works for some shooters and not others depending on build and shooting position. Aftermarket customization options are narrower than for AR-platform .308 rifles. Customer service experiences vary, which is a recurring theme in PTR discussions. The value proposition, quality relative to price, is generally viewed positively, especially when compared to similar HK-pattern imports. ## Pricing **6 offers available** | Vendor | Price | |--------|-------| | Grabagun Com | $1389.99 | | Shootingsurplus Com | $1415.78 | | Buds Gun Shop | $1424.49 | | Primaryarms Com | $1460.00 | | Guns Com | $1460.99 | | Deguns | $1505.99 | ## Similar Products - [PTR GI 100 Tactical .308 Win Semi-Auto Rifle - 18" Barrel, Black/OD Green](https://gunsnation.com/p/ptr-gi-100-tactical-308-win-semi-auto-rifle-18-barrel-black-od-green/UCFo6HUWu) - [PTR 91 A3S Tactical .308 Win Semi-Auto Rifle - 18" Barrel, 10-Round](https://gunsnation.com/p/ptr-91-a3s-tactical-308-win-semi-auto-rifle-18-barrel-10-round/UCFo6HUih) - [PTR-113 .308 Semi-Auto Rifle - Green Parkerized Precision](https://gunsnation.com/p/ptr-113-308-semi-auto-rifle-green-parkerized-precision/UCFo6HUnz) - [PTR A3S .308 Semi-Auto Rifle - Tactical Precision Black Edition](https://gunsnation.com/p/ptr-a3s-308-semi-auto-rifle-tactical-precision-black-edition/UCFo6HUdS) - [PTR GIR 101 .308 Semi-Auto Rifle - OD Green Precision Shooter](https://gunsnation.com/p/ptr-gir-101-308-semi-auto-rifle-od-green-precision-shooter/UCFo6HUVJ) - [PTR 91 GIR Green .308 Semi-Auto Rifle - Versatile Tactical Power](https://gunsnation.com/p/ptr-91-gir-green-308-semi-auto-rifle-versatile-tactical-power/UCFo6HUYm) --- *Data from [GunsNation](https://gunsnation.com)*