Ruger GP100

"GP100" redirects here. For the melanoma tumor-specific antigen, see Glycoprotein 100. For the Nvidia GPU architecture, see Pascal (microarchitecture).

Revolver

GP100

Ruger KGP-141 with speed loaders of .357 ammunition.

Type| Revolver
Place of origin| United States
Production history
Manufacturer| Sturm, Ruger & Co.[1]
Produced| 1985–present [1]
No. built| 734,500[2]
Variants| See Models
Specifications
Mass| 35–45 oz (990–1,280 g)[3]
Length| 8–11.5 inches (200–290 mm)[3]
Barrel length| 2.5 in (64 mm)[3]
3 in (76 mm)[3]
4 in (100 mm)[3]
4.2 in (110 mm)[3]
5 in (130 mm)[4]
6 in (150 mm)[3]

* * *

Cartridge| •10mm Auto

•.22 Long Rifle

•.327 Federal Magnum

•.357 Magnum

•.38 Special

•.44 Special
Action| Double-action revolver
Effective firing range| 55–110 yards (50–101 m)
Maximum firing range| +/− 550 yards (500 m)
Feed system| 5-shot cylinder (.44 Special)
6-shot cylinder (.357 Magnum, .38 Special, & 10mm Auto)
7-shot cylinder (.357 Magnum & .327 Federal Magnum)
10-shot cylinder (.22 Long Rifle)[3]

The GP100 is a family/line of double action five- (.44 Special), six- (.357 Magnum, .38 Special, & 10mm Auto), seven- (.357 Magnum and .327 Federal Magnum), or ten-shot (.22 Long Rifle) revolvers made by Sturm, Ruger & Co., manufactured in the United States.

## History

[edit]

The GP100 was an evolution of an earlier Ruger double-action revolver, the Security Six.

It was introduced in 1985 as a second generation of the Ruger double-action, exposed-hammer revolvers intended to replace Ruger's Security-/Service-/Speed-Six line.

It was made stronger with the intent to fire an unlimited number of full-power .357 Magnum rounds. The first significant change was introduced with the Ruger Redhawk and that involved a new triple-locking cylinder mechanism with a lever on the crane rather than using the end of the ejector rod to lock.

Another change was the use of stronger steels and the redesigned, beefier shape of the frame.

Traditional revolver frames had exposed metal at the front and rear of the grips, with the frame determining the shape of the grips. This meant that to have a round butt concealed carry version and a square butt holster or target version of the same gun usually meant having two different frame shapes.

The GP100 series, instead, used a small rectangular "peg" grip large enough to enclose the hammer spring and strut. The grips could then be any shape desired, as long as they were large enough to enclose the peg.

This was not a new innovation, having been used by Dan Wesson and some High Standard revolvers that predated the GP100.

The Dan Wesson patent (U.S. patent 3,683,535) was granted in 1972 and Ruger's patent (U.S. patent 4,625,445) was granted in 1986.

## Features

[edit]

### Grips

[edit]

The stock grips are made of Santoprene, a soft, chemical resistant elastomer that helps absorb the recoil of firing.

Panels on the side, made of black plastic, goncalo alves wood, or rosewood, provide contrast to the flat black of the Santoprene.

The grips are now Hogue one piece rubber grips standard.[3][5]

### Frame

[edit]

The GP100 shares the crane lock from the Redhawk that was later used in the small frame SP101 revolver.

All of these models use the same thickness on the solid frame and double latching system as used on the heavy .44 Magnum.

Because of these features, the GP100 series is widely described as one of the strongest medium frame revolvers ever made.[5]

### Ammunition

[edit]

The GP100 is manufactured in .327 Federal Magnum, .357 Magnum, .38 Special, .22 Long Rifle, .44 Special, and 10mm Auto calibers. Available barrel lengths are 2.5 inches (64 mm), 3 inches (76 mm), 4 inches (100 mm), 4.2 inches (110 mm), 5 inches (130 mm), and 6 inches (150 mm) with partial or full length underlugs.[3]

Blued steel or stainless steel finishes are available, with stainless model numbers preceded by a "K".

### Safety

[edit]

The firing pin of the GP100 is mounted inside the frame. The transfer bar of the GP100 is connected directly to the trigger. The transfer bar must be present between the hammer and the firing pin in order for the cartridge to be fired.

The transfer bar only assumes the required position when the trigger is pulled completely rearward.

### Sights

[edit]

GP100 models are available with fixed or adjustable sights. Fixed sight models are designated by a "F" suffix model number.

### Cylinder

[edit]

When the cylinder is closed and the gun is at the point of firing, the cylinder crane is locked into the frame at the front and rear of the crane and by the cylinder lock at the bottom of the crane opening.

### Disassembly

[edit]

The GP100 disassembles into three major modules with only limited use of tools. This allows the user to easily clean the revolver after shooting. The design of the gun eliminates the need for a frame "sideplate", a feature which contributes to the GP100's reputation for strength.[5]

## Specifications

[edit]

Major sub units of GP100 (KGP-141)

* Weight: Variable, dependent on barrel and shroud length
* Barrel lengths: 2.5 inches (64 mm), 3 inches (76 mm), 4 inches (100 mm), 4.2 inches (110 mm), 5 inches (130 mm), and 6 inches (150 mm),[3] the run of 5" GP100 revolvers was made for the distributor, Davidson's.[4]
* Action: The GP100 may be fired by either cocking the hammer and subsequently pulling the trigger (a.k.a. Single Action), or by merely pulling the trigger when the hammer is not cocked (a.k.a. Double Action).
* Maximum effective range: 55–110 yards (50–101 m), depending on barrel length, cartridge load, and additional optical sights
* 5-Shot: .44 Special
* 6-Shot: .357 Magnum, .38 Special, and 10mm Auto
* 7-Shot: .357 Magnum and .327 Federal Magnum
* 10-Shot: .22 Long Rifle

## Models

[edit]

KGP-141 and KGP-160 .357 Magnum revolvers

Since its introduction, it has been produced with a number of variations including various barrel lengths and profiles, fixed or adjustable sights, and in blued carbon steel or stainless steel.

Catalog Number | Caliber[1] | Barrel Length[3] | Finish | Sights | Weight | Shroud

|
|
|
|
|
|

GP-141  | .357 Mag. | 4" | Blued | Adjustable | 41 oz | Full
GP-160  | .357 Mag. | 6" | Blued | Adjustable | 43 oz | Short
GP-161  | .357 Mag. | 6" | Blued | Adjustable | 46 oz | Full
GPF-331  | .357 Mag. | 3" | Blued | Fixed | 36 oz | Full
GPF-340  | .357 Mag. | 4" | Blued | Fixed | 37 oz | Short
GPF-341  | .357 Mag. | 4" | Blued | Fixed | 38 oz | Full
KGP-141[2] | .357 Mag. | 4.2" | Stainless | Adjustable | 41 oz | Full
KGP-151[3] | .357 Mag. | 5" | Stainless | Adjustable | 42 oz | Full
KGP-160  | .357 Mag. | 6" | Stainless | Adjustable | 43 oz | Short
KGP-161  | .357 Mag. | 6" | Stainless | Adjustable | 46 oz | Full
KGPF-330  | .357 Mag. | 3" | Stainless | Fixed | 35 oz | Short
KGPF-331  | .357 Mag. | 3" | Stainless | Fixed | 36 oz | Full
KGPF-340  | .357 Mag. | 4" | Stainless | Fixed | 37 oz | Short
KGPF-341  | .357 Mag. | 4" | Stainless | Fixed | 38 oz | Full
KGPF-840  | .38 Spl. | 4" | Blued | Fixed | 37 oz | Short
KGPF-841  | .38 Spl. | 4" | Blued | Fixed | 38 oz | Full
GPNY[4] | .38 Spl. | 3" & 4" | Stainless | Fixed | 36~37 oz | Full
KGP-4327-7  | .327 Fed. Mag. | 4.2" | Satin Stainless | Adjustable | 40 oz | Full
1757  | .22 LR. | 5.5" | Satin Stainless | Adjustable | 42 oz | Short
1761[5] | .44 Spl. | 3" | Satin Stainless | Adjustable | 36 oz | Full
1790  | .357 Mag | 2.5" | Blued | Adjustable | 35 oz | Full

## Special editions

[edit]

In 2016, a limited edition variant of the GP100 was available from the Friends of NRA through a fundraising raffle.

The guns were all stainless, chambered in .357 Magnum, had 4 inch barrels, serial numbers with "NRA" prefixes, and rosewood grip inserts engraved with "NRA". Only 1,145 were produced.[6]

In 2021, Ruger produced 500 GP100s in memory of Jeff Quinn, a YouTuber and founder of the online firearms magazine Gunblast, who died the previous year.[7]

## Users

[edit]

* Canada: Local Police[8]
* Greece: EKAM counter-terrorist unit of the Hellenic Police[9]
* Serbia: Special Anti-Terrorist Unit[10]
* USA: New York Police Department "GPNY" [11]

## Gallery

[edit]

* GP100 (mod. KGP-161) revolver

* GP100 (KGP-161) with opened cylinder and .357 Magnum ammunition

* Ruger GP100 revolver adjustable rear sight

## References

[edit]

1. ^ a b Peterson, Philip. Gun Digest Book of Modern Gun Values: The Shooter's Guide to Guns 1900 to Present (16th ed.). p. 242.
2. ^ ""Ruger GP100® Serial Number History"". Archived from the original on 27 March 2022.
3. ^ a b c d e f g h i j k l "Ruger GP100". Sturm, Ruger & Co., Inc. Retrieved 8 December 2012.
4. ^ a b "Ruger GP100 Double Action Revolver". Gallery of Guns. Davidson's. Archived from the original on 6 May 2012. Retrieved 16 November 2011.
5. ^ a b c Sweeney, Patrick (2007). Gun Digest Book of Ruger Pistols and Revolvers. Iola, Wisconsin: Gun Digest Books. pp. 172–174\. ISBN 978-0-89689-472-3.
6. ^ "2016 Standard Package Calatog" (PDF). Friends of NRA. 2016. p. 5\. Archived from the original (PDF) on 7 January 2016.
7. ^ C, Luke. "Ruger Releases Jeff Quinn Memorial GP100 Revolver". The Firearm Blog.
8. ^ "Ruger Super GP100 9mm revolver review". gunsandammo.com. Retrieved 28 August 2024.
9. ^ "Greece Ministry of Public Order Press Office: Special Anti-Terrorist Unit" (PDF). astynomia.gr - Official Website of the Hellenic Police. July 2004. Retrieved 13 October 2009.
10. ^ "Specijalne-jedinice.com | Special Anti-terrorist Unit-SAU". specijalne-jedinice.com. Retrieved 25 February 2021.
11. ^ "NYPD Duty Weapons For Patrol". leelofland.com. Retrieved 28 August 2024.

## Further reading

[edit]

* Wilson, R. L.; G. Allan Brown (2008). Ruger & His Guns: A History of the Man, the Company and Their Firearms. Book Sales, Inc. ISBN 978-0-7858-2103-8.

## External links

[edit]

Wikimedia Commons has media related to:
Ruger GP100 (category)

* Ruger's GP100 page
* Ruger-produced Dissembly video
* Ruger-produced Cleaning video
* Ruger-produced Reassembly video
* Ruger’s .357 GP-100 Revolver Considered a Modern Classic, Gun Week, by Jim Williamson

* v
* t
* e

Sturm, Ruger & Co.

Rifles|

* 10/22
* American rifle
* American rimfire
* AR-556
* Deerfield carbine
* Gunsite Scout
* M77
* Mini-14
* Model 44
* Model 96
* No. 1
* No. 3
* Police carbine
* Precision rifle
* SR-556
* SR-762

Submachine guns|

* MP9

Shotguns|

* Gold Label
* Red Label

Pistols|

* American pistol
* Hawkeye
* LC9
* LCP
* MK I
* MK II
* MK III
* MK IV
* P-Series
* Ruger-57
* Security-9
* SR-Series
* SR22
* SR1911

Revolvers|

* Bearcat
* Bisley
* Blackhawk
* GP100
* LCR
* Old Army
* Redhawk
* Security-Six
* Super Redhawk
* Single-Six
* SP101
* Vaquero
* Wrangler

Cartridges|

* .204 Ruger
* .300 Ruger Compact Magnum
* .327 Federal Magnum
* .338 Ruger Compact Magnum
* .375 Ruger
* .416 Ruger
* .480 Ruger

Subsidiaries|

Marlin Firearms
*[No.]: Number
*[v]: View this template
*[t]: Discuss this template
*[e]: Edit this template