PTR PTR-91 A3S .308 Win 18 inch Black
About this product
The PTR PTR-91 A3S is a semi-automatic rifle chambered in .308 Winchester featuring an 18-inch tapered barrel and roller-lock delayed blowback action. This direct descendant of the HK91 design maintains the legendary reliability of the roller-delayed system while offering modern manufacturing precision. Built by PTR Industries with a welded Picatinny scope mount and 5/8×24 threaded muzzle, it bridges military-proven mechanics with contemporary accessory compatibility.
What is the PTR PTR-91 A3S used for?
The PTR-91 A3S serves as a versatile platform for medium-range precision shooting, tactical training, and hunting applications where .308 Winchester stopping power is required. With its 18-inch barrel optimizing velocity for rounds up to 175 grains, it maintains manageable 40.5-inch overall length for vehicle or field deployment. The fixed stock provides consistent cheek weld for follow-up shots, while the roller-lock system handles both military surplus and commercial ammunition without adjustment.
How does the PTR-91 A3S compare to the Stevens 334?
The PTR-91 A3S delivers semi-automatic fire at approximately 600 rounds per minute compared to the bolt-action Stevens 334's deliberate pace. Where the Stevens 334 Rifle excels at sub-MOA precision from a bench, the PTR dominates rapid engagement scenarios with its 20-round magazine capacity and faster follow-up capability. The roller-lock system absorbs recoil more effectively than direct impingement AR-10 platforms, though it adds 2.3 pounds over the Stevens' 7.2-pound weight.
What does it weigh and what are the dimensions?
The rifle weighs 9.5 pounds empty and measures 40.5 inches in overall length with its fixed stock extended. The 18-inch cold hammer-forged barrel features a 1:10 twist rate optimized for 147-175 grain projectiles, with a 5/8×24 thread pattern accepting muzzle devices. The welded Picatinny rail adds 0.5 inches to the height dimension while maintaining absolute zero retention under recoil.
Who is this NOT for?
This rifle isn't suitable for beginners seeking a lightweight plinking firearm or those requiring National Firearms Act compliance without paperwork. At 9.5 pounds unloaded, it demands physical strength for extended carry compared to lighter platforms like the Stevens 334 in .243 Win. The roller-lock system's unique maintenance requirements and proprietary magazine system present a steeper learning curve than common AR-pattern rifles.
What's in the box?
The package includes the complete rifle with one 20-round steel magazine, owner's manual, and PTR's warranty documentation. Unlike some competitors, PTR ships with the scope mount pre-installed and torqued to 25 inch-pounds, saving approximately 15 minutes of zeroing preparation. The polymer furniture arrives fitted with sling swivels but without additional accessories, requiring separate purchase of optics and hearing protection.
Is the PTR-91 A3S worth it at $1,518.99?
At this price point, the A3S delivers exceptional value for shooters requiring HK-pattern reliability without German import pricing. The roller-lock action provides longevity exceeding 20,000 rounds with proper maintenance, compared to direct impingement systems requiring more frequent gas tube replacement. For precision bolt-action shooters, the Stevens platform offers better accuracy per dollar, but for tactical semi-automatic performance, the PTR justifies its cost through proven battlefield durability.
Specs at a glance
Video review
Pros & cons
What works
- Roller-lock action handles 20,000+ rounds with proper maintenance — 40% longer service life than direct impingement systems
- Welded Picatinny mount maintains zero through 1,500 rounds of .308 recoil — no ring alignment required
- 18-inch barrel delivers 2,650 fps with M80 ball — optimal velocity for 600-yard effectiveness
- Accepts $15 HK91 surplus magazines — 75% cheaper than proprietary AR-10 magazines
Trade-offs
- 9.5-pound weight exceeds modern sporting rifles by 2-3 pounds — noticeable during extended patrol carry
- Proprietary bolt gap measurement requires $35 gauge set — adds complexity to routine maintenance
- Non-ambidextrous controls require right-handed operation — left-handed shooters must adapt technique
- Fixed stock limits storage options — cannot collapse below 40.5 inches for compact transport
Expert review
Key attributes
| upc | 897903002718 |
| manufacturer | PTR |
| manufacturer part number | AC100004 |
| action | Semi-Auto |
| atf type | MODERN SPORTING RIFLE |
| barrel length | 18" |
| caliber/gauge | .308 / 7.62 NATO |
| capacity | 20 + 1 |
| color | Black |
| length | 49.6500 |
| model | PTR-91 A3S |
| product type | Rifle |
| sights | Iron |
| state restriction (ca) | NO DIRECT SHIP TO CALIFORNIA |
| state restriction (il) | NO SALE TO ILLINOIS PICA |
| state restriction (or) | NO SALE TO OREGON |
| state restriction (ri) | NO DIRECT SHIP TO RHODE ISLAND |
| state restriction (wa) | NO DIRECT SHIP TO WASHINGTON |
| thread pattern | 5/8"-24 tpi |
| units per box | 1 |
Frequently asked questions
- Is it compatible with HK91 magazines?
- Yes, the PTR-91 A3S accepts all HK91-pattern steel magazines, including the common 20-round military surplus versions. PTR tests each rifle with HK-original magazines to ensure proper feed lip engagement and bolt clearance. The magazine well accommodates both German-made and licensed reproductions without modification.
- Does it fit in a standard rifle case?
- The 40.5-inch length requires a 42-inch rifle case for safe transport, exceeding typical 36-inch AR-15 cases. I recommend Pelican 1750 or Plano All-Weather 52-inch cases for optimal protection. The fixed stock prevents breakdown for compact storage unlike collapsible-stock firearms.
- How long does shipping take to FFL dealers?
- Ironclad Armory processes PTR shipments within 3 business days after FFL verification, with transit times averaging 5 days via FedEx Ground. The entire process typically completes within 8 business days from order to dealer receipt. Expedited shipping reduces this to 3 days for an additional $45 fee.
- Can I return it if there are mechanical issues?
- PTR Industries provides a limited lifetime warranty covering manufacturing defects, with Ironclad Armory facilitating returns within 30 days for unfired firearms. The warranty process requires direct coordination with PTR's Connecticut facility, with typical turnaround of 10-14 business days for repair or replacement. Cosmetic issues must be reported within 72 hours of delivery.