About Us


First, let me say THANK YOU for visiting our web site. Most of our products on this website are pretty straight forward and self explanatory.  Our 1.1-10x30 FSO - well that is another story. We have been working with an OEM manufacturer for more than two years to develop this scope.

We have been racking our brains to the point that our heads are smoking, trying to figure out how to present this scope to you. Please allow us to give you a little background about GRSC and the development of the 1.1-10x30 FSO. We think it's best to describe GRSC as a micro-company mainly involved in T&E and R&D. GRSC  consists of a small team of innovative individuals who have taken new concepts and ideas and successfully developed them into products that have set the trend for the industry in their respective categories.

Please take the time to read more ABOUT US (below) -  you will gain a working knowledge of the original CRS (Combat Rifle Scope) project. The 1.1-10x30 FSO with our T1 Reticle is a continuation of that project.  Please note that the world's first 1-6x front focal plane reticle scopes were produced for GRSC and Norden Performance in cooperation with our OEM manufacturers. We are the designers, inventors and patent holders for the world's first Horseshoe Reticles and the "RULE OF 10" ranging system for use in rifle scopes.

It is worth mentioning that a company selling a very similar version of the NP (Norden Performance) 1-6x24 CRS with a FFP Horseshoe Reticle was recently awarded a military contract. The scopes for that contract are being supplied to the military by a company that is independent of and NOT associated with GRSC or Norden Performance.

Now, let's get to the 1.1-10x30 FSO. It has been said that a picture is worth a thousand words - so a video should be worth a million. We have produced a series of very informative instructional videos that we feel will help you understand the 1.1-10x FSO and its' capabilities. 

We apologize for the current quality of our videos, as we our operating on a very tight budget, therefore the videos are not at professional grade level presently. PLEASE UNDERSTAND that the clarity and resolution you will see in our videos filmed through our scope are not even close to what you will see in person. These videos demonstrate and teach how to use our 1.1-10x FS0 and the T1 Reticle to range and engage targets from 7 to 1,000 yards. 


As with anything, TALK IS CHEAP - therefore, we sell the 1.1-10x FSO with a 45 day money back guarantee. 

Put it on your rifle and try it yourself. If you don't like it return it for a refund.

                              GRSC 1.1-10x30 FSO = Simple  / Fast / Accurate

Be Safe, 

The GRSCinc Team

 Ed Verdugo

 Fred Kaplan


The concept is now reality. After decades of testing and evaluation (T&E) of existing rifle scopes and research and development (R&D) of tactical sighting systems, the “do it all” Combat Rifle Scope (CRS) is here.


Drawing on lessons learned as a Special Forces soldier and an avid shooter, Ed Verdugo (founder of GRSC.) searched in vain for what he envisioned as the perfect combat rifle scope. Ed truly believes that if such a scope could be made, it would enhance the lethality of our war fighters and ultimately, help save their lives. Upon learning that one did not exist, the quest was born...


The concept called for a variable power scope with a general purpose combat (GPC) reticle. This scope/sighting system was intended to cover the full spectrum of combat from CQB (close quarters battle) engagements to the maximum effective range of today’s modern assault and battle rifles.

The primary objective of this concept was speed at CQB distances.

Also, the reticle was to be illuminated for low light environments and, when combined with modern night vision equipment, the scope would provide day/night capability.

After many years of T&E, Ed designed the horseshoe (HS) reticle and the “rule of 10” ranging system, both of which would eventually be used in the CRS. Ed already has been awarded two patents on the reticle design, with others still pending. Finally, with the scope and reticle specs set, the next challenge was to get it produced. GRSC had no capability to manufacture scopes. So, the design concept was introduced to many of the top quality scope manufacturers – only to be rejected.

In ­­­2002, Ed met Val Leatu (President of IOR Valdada) at TREXPO in Ontario, California. IOR Valdada was interested in the design concept. In fact, it successfully incorporated into some of its scopes portions of Ed’s GPC reticle design. However, IOR Valdada was unwilling to embrace the design concept in its entirety.

As a result, GRSC, in its pursuit to bring the concept to reality, continued to approach other manufacturers. In 2003, GRSC began working with Millett Sights on the project. Millett Sights had a small quantity of Combat Rifle Scopes manufactured in China and imported them for GRSC. This joint effort with Millett Sights was short-lived, due to quality control problems, and was terminated in 2005. Then, GRSC approached US Optics to make a 1-6 CRS prototype. [Early on, it was decided that the CRS should be a 1-6 scope with an illuminated GPC reticle positioned on the FFP (front focal plane).]

Up until that time, no one had ever produced a 1-6 scope. Moreover, none of the scope manufacturers Ed contacted were even interested in working with GRSC to try to produce a 1-6.

The first five 1.5-6 illuminated SN4 scopes that US Optics made, were made for GRSC with the GPC 343 non-caliber-specific horseshoe reticle. These five were the first GRSC combat rifle scopes produced. Two of those scopes were sent to US soldiers in combat in Iraq, and one went to the Philippines Special Ops forces. Feedback on the HS reticle and 10” ranging system (based on the size of the human head) was very positive. Based on user feedback from the field, requests were made for:

  • *A smaller, lighter scope
  • *1-6 magnification
  • *Brighter illumination
  • *BDC (bullet drop compensating) reticle for M4 rifle using M855-62gr ammo


Once more, GRSC approached some of the best manufacturers to try to have the CRS built – only to be turned down again! In September 2005, Ed (GRSC), with John Pride (PFI) and Jean-Pierre Stassin (Belgian Air Force Para-Commandos), presented the GRSC 1.5-6 CRS (manufactured by US Optics) at the War Fighter Seminar at Fort Benning, Georgia. After the seminar, live fire demos were conducted for the AMU (US Army Advanced Marksmanship Unit) and DM-R (Designated Marksman Rifle) at Fort Benning.

In February 2006, Ed, with John Pride and Mickey Fowler of PFI, exhibited the GRSC 1.5-6 CRS for the US Marines at Marine West, Camp Pendleton, California. Shortly afterwards, John Pride arranged a live fire demo for the Marines at Camp Pendleton. Based on feedback from those demos and field usage, GRSC set out – determined – to proceed with the CRS project.

In 2008, GRSC assembled a small team of personnel to try again to get the next version of the CRS built. This was the genesis of Norden Performance. GRSC’s new team was able to get the current 1-4 CRS manufactured in Korea.

In 2009, the GRSC team started discussions with a top Japanese scope manufacturer on the current 1-6 CRS.

Since GRSC is a very small company and, as Dirty Harry (“Magnum Force”) said, “… A good man always knows his limitations …,” GRSC decided this year to turn over the 1-6 CRS project to the newly-formed company, Norden Performance.

Norden Performance consists of the original team members (three of whom are veterans) who successfully brought the Korean 1-4 CRS and now, the Japanese 1-6 CRS, into production.


The Story Continues:

After we and our partners at Norden Performance (NP) brought the industries first successful 1-6x24 FFP COMBAT RIFLE SCOPE with the M4-62 HORSESHOE RETICLE to market, we again took our reticle design/concept to many of the worlds best scope companies, only to have our design/concept rejected over and over again. You can now see many of these same companies with their version of our reticle designs.

Just this last year NP submitted our 1-6 CRS with our newest FFP Horseshoe Reticle design directly to our military thru the Expeditionary Technology Competition. The NP 1-6 CRS and our reticle were rejected again.

It is very interesting that a military contract for a very similar (Japanese components?) 1-6 FFP Horseshoe reticle scope was just recently awarded to SIG.

This is actually a very good thing if one understands our original objective. The sad part is we truly do not belive that reticle in the SIG 1-6 scope is as efficient (deadly) as our design. IMO

To send our warfighters into harms way with anything less than the best is doing them a disservice.

About four years ago NP working with our Japanese manufacture were on the verge of bringing a very nice high quality 1-8 scope to market. At the last moment this scope was pulled from NP and given to a much larger company. Well BOHICA!!!

Moving on. About two years ago at the Shot Show we met the company we are currently working with. This is a Chinese company. We were able to convince them to try to do a 1-10x scope. The current FSO is the culmination of two years of development. We're excited about this new product. The proof is in the pudding, time will tell.

Thank you,

Ed Verdugo