H&K PSG1

Heckler & Koch's roller-delayed police precision rifle and its family (PSG1 A1, MSG90 and its successors): the origins and what is only repeated about them, how the action is tuned for precision, how to tell the variants apart, the field strip and maintenance from the Bundeswehr's G3 manual, optics and accessories, accuracy, US imports and law, and a PSG1-pattern build from HK91 parts.

Firearms

H&K PSG1 · Deep Dive

H&K PSG1

The famous "50 shots into 80 mm at 300 m" standard appears in no H&K source found, and no H&K source ties the rifle to Munich.

Heckler & Koch's roller-delayed police precision rifle and its family (PSG1 A1, MSG90 and its successors): the origins and what is only repeated about them, how the action is tuned for precision, how to tell the variants apart, the field strip and maintenance from the Bundeswehr's G3 manual, optics and accessories, accuracy, US imports and law, and a PSG1-pattern build from HK91 parts.

Photo: PSG1 and MSG 90 by Geckcgt · CC BY-SA 4.0

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    Volumes

    1. Vol 1 Origins: Munich, the Missing Police Rifle, and the Roller-Delayed Inheritance What is documented about why West German police wanted a precision semi-automatic, what is only repeated, and the G3 marksman rifle the PSG1 was built to outdo
    2. Vol 2 The Family Grows: PSG1 A1, MSG90, MSG90 A1 and A2, Users and Cost What H&K published about each model, where its own figures contradict each other, who is documented as using the rifles, and what they cost
    3. Vol 3 How It Works: Roller-Delayed Blowback Tuned for Precision The full cycle part by part in H&K's and the Bundeswehr's own words, the 1:4 ratio, the fluted chamber, the closing aid, the trigger, and the PSG1's departures from the G3
    4. Vol 4 Field Strip, Detail Strip, Maintenance and Repair What H&K's own PSG1 booklet says, what it leaves out, and how the Bundeswehr's G3 regulation fills the gaps for the shared roller-delayed parts
    5. Vol 5 The Family and How to Tell Them Apart PSG1, PSG1 A1, MSG90 and its versions, the SR9 sporting rifles, the HK41, HK91 and G3, and the clones that imitate them: a photographic identification guide
    6. Vol 6 Optics, Mounts, the Tripod and Accessories The PSG1's factory telescope and fixed mount, the G3 claw mount it replaced, the A1's Schmidt & Bender and the MSG90's 10×, the Swiss tripod, and the aftermarket parts makers actually list
    7. Vol 7 Accuracy and Ammunition What H&K claimed in its own words, where the famous 50-shot standard really comes from, what testers measured, the 7.62×51 the rifle was built around, and what the fluted chamber does to brass
    8. Vol 8 Owning One in the United States: Imports, the Market and the Law How PSG1s and MSG90s reached American owners after the 1989 import decision, why imports stopped in 1998, what genuine rifles sell for, and the federal and Michigan law that applies to keeping one
    9. Vol 9 Making One: PSG1-Pattern Rifles from HK91 Parts, the Law, and a Lab Build The routes American builders actually use, what each PSG1 feature takes to reproduce, the parts that exist and the parts that do not, the 922(r) count for an HK91-pattern rifle, the select-fire trap in every G3 kit, and Michigan