RARE Swiss SIG PE90P Civilian Version STGW90 550 20.5” 5.56 Semi-Auto Rifle

SOLD FOR: $4,358.00

LSB#: LSB250809NF019

Make: SIG ARMS

Model: PE90P, Imported by SAN SWISS ARMS circa 10-2014

Serial Number: 28641

Year of Manufacture: Circa mid to late 1990s. These rifles were produced from 1986-1999 and 35000 total were made. 

Caliber: 5.56 / .223

Action Type: Semi-Automatic, Long Stroke Gas System, fed by proprietary SIG 550 pattern magazines. 

Markings: The lower receiver is marked “SIG”, “8641”, “S 1”. The nose of the stock is marked “WEIDMAMN”. The upper receiver “BP CH 016  PE  28641”, the front lug “410” the rear lug “PE415”. The bottom of the barrel under the handguard “SAN 62168 / KW 10 2014 / San Swiss Arms Switzerland / PE90P 5.56x45mm / EPS Imports – Chandler, AZ”. The inside of the handguards were also marked  “WEIDMAMN”. 

Barrel Length: 20.5”, with integral flash hider and grenade launching lug. 

Sights / Optics:  The front sight is a hooded post sight with flip up tritium post, the tritium is depleted.  The rear sight is a four position rotating drum with three apertures and a V notch with two tritium lamps. The tritium glows brightly in low light conditions.   

Stock Configuration & Condition: The furniture set includes a 13” polymer two piece handguard with fold down bi-pod, a SIG pistol grip with storage, and a folding stock with rubber butt pad. The length of pull is 13.25” from the trigger to the back of the butt pad. The rifle weighs 8lbs 11OZ. The furniture set shows some minor scattered lines and surface level scratches. There is a notable rough patch on the right rear of the forend. The front top right edge of the pistol grip also has a rough patch. There are no visible chips or cracks. Overall the furniture is in Very Good condition.     

Magazine Quantity & Condition: None

Type of Finish: Grey Enamel.  

Finish Originality: Original

Bore Condition: The bore is bright and the rifling is sharp. There is no visible erosion or pitting. The muzzle shows no verdigris. The feed ramp shows very minor copper fouling. In this writer’s opinion the bore rates 10/10. 

Overall Condition: This rifle retains about 98.5% of its metal finish. The right side shows minor nicks in the finish, with a rub mark just behind the ejection port. The dust cover rubber is soft and pliable. The rubber on the charging handle has minimal wear. The right side of the barrel has a surface level line. Overall this rifle is in about Very Good+-Excellent condition.    

Mechanics: The action functions correctly. We did not fire this rifle. As with all used firearms, a thorough cleaning may be necessary to meet your maintenance requirements.

Box, Paperwork & Accessories: This rifle includes a correct bayonet with sheath.  

Our Assessment: This Swiss-made SIG PE90P is the civilian iteration of the STGW90 / SIG 550-1. It is a semi-automatic 5.56 NATO rifle built on a 20.5″ barrel that balances flat trajectory and manageable recoil for practical accuracy at typical engagement ranges. The long-stroke gas piston operating system delivers proven, low-maintenance reliability and in this rifle exceptionally smooth operation under adverse conditions. The furniture includes a folding stock and an integral forend bipod transforming the forend into an immediately deployable support for accurate, rested shooting without extra kit. The rifle is fed by proprietary SIG 500-series magazines that lock up solidly and feed consistently, reducing stoppages and making reloads confident. Traditional iron sights are retained including a hooded front sight with flip-up tritium post matched to a four-position rotating drum rear aperture sight that includes a dedicated night-sight position, giving the rifle a clean, military-derived silhouette and all-weather usability. The whole package feels like a Swiss-crafted reinterpretation of the AK concept purpose-built, but with markedly better ergonomics, a more modern caliber, and the high-precision fit and finish one would expect from a Swiss made item. These combined traits make it an exceptionally well-made, user-friendly rifle that performs reliably in the field and rewards careful handling with consistent accuracy. This rifle is in about Excellent condition, cycles almost unbelievably smoothly, and is a rare find on today’s market. Here in the writer’s room it was a head turning rifle and it will be one out on the range as well! Please see our high quality photos via the link and best of luck with your bidding!!!-R.L.