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How to mount a red dot sight on HS H11 RDR

About HS

HS Produkt, a Croatian firearms manufacturer, was established in 1991. Initially named IM Metal, the company underwent a rebranding in 2001, adopting its current name following the notable success of their HS2000 series of semi-automatic pistols. The company has a strong presence in the United States market, where Springfield Armory, Inc. distributes several of their firearms under various brand names including Hellcat, XD, and Echelon. Notably, about ninety percent of HS Produkt’s firearms are exported to the U.S., underlining the significant demand and popularity of their products in the American firearms market.

About HS H11 RDR

The H11 RDR is a micro-compact pistol by Croatian manufacturer HS Produkt, equipped with a polymer frame and a hammer-forged barrel. This single-action, striker-fired pistol comes with two double-stack magazines – an 11-round magazine with pinky extension and a 13-round extended magazine. This distinguishes it from the bigger HS H11 Pro, which comes with a standard 15-round and an additional 17-round extended magazine. HS H11 RDR incorporates both a trigger safety and a firing pin safety, along with a loaded chamber indicator. The texture of the grip resembles fine-grit sandpaper, providing a secure grip. It features a fiber optic front sight and a dovetailed rear U-notch sight for improved aiming accuracy. In terms of size and weight, the HS H11 is shorter and lighter than the Pro model, weighing 455 grams without the magazine, with an overall length of 153 mm and a barrel length of 79.5 mm, thereby making it an ideal choice for concealed carry. The HS11 RDR includes a single Picatinny slot located underneath the front part of the pistol, designed for the attachment of accessories. The pistol can use +P ammo, but you should follow the manufacturer’s safety instructions carefully.

In the US market, this pistol is distributed by Springfield Armory, Inc. as the Hellcat.

The gun is available in the 9×19 caliber.

The HS H11 RDR is offered in two colour variants:

  • Black
  • FDE

Each colour variant is available with or without a threaded barrel. Models featuring threaded barrels are silencer compatible.

HS H11 RDR is optic ready. The models that are not optic ready are labeled HS H11, without the ‘RDR’ mark.

  • HS H11 RDR, black version without the threaded barrel
  • HS H11 RDR, FDE version without the threaded barrel (source: dynamikarms.ch)

Optic ready properties of HS H11 RDR

HS H11 Pro RDR has an optic cut that measures 43 mm in length and 21 mm in width.

The design of the optic cut on this handgun is made to accommodate a red dot sight with a Shield RMS mounting standard.

The optic cut on HS H11 RDR
The optic cut on HS H11 RDR
The optic cut on HS H11 RDR
The optic cut on HS H11 RDR

Red dot sights that can be mounted directly onto the optic cut of HS H11 RDR

Red DotProductDetails
ADE Advanced Optics RD3-018 Spike
ADE Advanced Optics RD3-021 Nuwa
ADE Advanced Optics RD3-021 Nuwa Pro
Ade Advanced Optics RD3-030 Apollo Pro
GPO Spectra Pistol Dot
JP Enterprises JPoint
Shield RMS
Shield RMS 2
Shield RMSc
Shield RMSd
Shield RMSw
Shield RMSx
Shield SMS
Shield SMS 2.0
Shield SMSc
Sig Sauer Romeo Zero
Sightmark Mini Shot A-Spec M3
Swampfox Sentinel 1×16
UTG OP3 Mini Micro
Vector Optics Frenzy-S 1x16x22
Vector Optics Frenzy-S 1x17x24 MIC
Vortex Defender CCW

No adapter plates are included in the box. If you wish to mount a red dot sight that does not use the Shield RMS mounting standard, a suitable converter plate is required.

HS H11 RDR with its accessories
HS H11 RDR with its accessories

Converter plate mounting options

Note: Using a converter plate results in a high-profile setup of the red dot sight.

Shield RMS below, Docter above

These plates allow the user to convert the mounting surface, making it suitable for attaching red dot sights that use the Docter/Noblex mounting standard.

Shield RMS below, Docter above_cta
Red DotProductDetails
Ade Advanced Optics RD3-002
ADE Advanced Optics RD3-006A Huracan
ADE Advanced Optics RD3-006B Huracan
ADE Advanced Optics RD3-009 Crusader
ADE Advanced Optics RD3-012 Delta
ADE Advanced Optics RD3-012 Delta Pro
ADE Advanced Optics RD3-013 Bertrillium
Athlon Midas TSR1
Burris Fastfire 2*
Burris Fastfire 3*
Burris Fastfire 4
Delta Optical MiniDot 3
Delta Optical MiniDot II*
Delta Optical MiniDot*
Docter QUICKsight 5.0 VRDiscontinued
Docter Sight 2 PlusDiscontinued
Docter Sight 3Discontinued
Docter Sight CDiscontinued
Hawke Reflex 1×25*
Hex Dragonfly
Leica Tempus
Leica Tempus 2
MAKdot 1×25
MAKdot SH
Meopta Meosight IV
Noblex QUICKsight 5.0 VR
Noblex Sight 2 Plus
Noblex Sight 3
Noblex Sight C
Noblex Sight G
Primary Arms SLx RS-10 **
Sightmark Mini Shot M-Spec
Sightmark Mini Shot Pro Spec*
US Optics DRS 2.0*
US Optics DRS 2.0 Enhanced*
UTG OP3 Micro
Vector Optics Frenzy 1x17x24
Vector Optics Frenzy 1x20x28*
Vomz Pilad 1×20
Vortex Venom
Vortex Viper

Shield RMS below, Trijicon RMRcc above

These plates allow the user to convert the mounting surface, making it suitable for attaching red dot sights that use the Trijicon RMRcc mounting standard.

Shield RMS below, Trijicon RMRcc above_cta

Shield RMS below, C-more above

These plates allow the user to convert the mounting surface, making it suitable for attaching red dot sights that use the C-more mounting standard.

Shield RMS below, C-more above_cta
Red DotProductDetails
C-more RTS
C-more RTS 2
C-more STS
C-more STS 2
Delta Optical MiniDot HD 24
Delta Optical MiniDot HD 26
Delta Optical Stryker
FTP Optics Alpha 3
Kahles Helia RD
Kite Optics K1
Sig Sauer Romeo3 1×25
Sig Sauer Romeo3 Max 1×30
Sig Sauer Romeo3 XL 1×35
Vector Optics Frenzy 1x26x32
Vortex Razor

If you manufacture adapter plates for this pistol and are interested in cooperation with us, send an e-mail to [email protected].

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