NEW Patent Pending / MFI Century Arms / PTR CA-3 6.20" Low Profile Scope Mount for CA-3 & CETME Model C ONLY / Price includes USPS Priority Mail & Insurance
Century Arms CA-3 Scope Mount for CA3 Rifle, CA-3, CA3, CA 3, Scope Mount
THIS PRODUCT IS MADE IN THE USA. 
- Description
- Restrictions
- IPR / Copyright
- Instructions
- Customer Review & Videos (off site)
- Details
- Shipping
- Reviews
Description
Contrary to what many may think... You can NOT put just ANY scope mount on a Century Arms CA3 / CA-3 or Spanish CETME C rifle that does not have the recoil stop block (see the last photo above) as the mount will eventually walk down the front of the receiver. So no matter if your mount is a B&T, MFI or Genuine HK it is the job of the recoil stop block to keep the mount in place.
- After more than 2 decades of: 100,000+ mounts sold, RND / examining customers clones and testing on 100s of different models of G3 & MP5, I have come up with what I believe is the ultimate profile for the underside of all our new scope mounts, which allows our mounts to universally fit all the variations out there, no matter how out of spec they may be.
- You do NOT need to completely remove the screw / bolt to attach the scope mount. The Claw / Hook can have the bolt / screw attached as a single unit with the 4 claws / hooks very near the end of the thread on the bolt, allowing the claw to splay outward past the leg of the mount, then it can be slipped onto the weapon. So there is no more fumbling with a loose screw and trying to find the hole. No other scope mount for the HK MP5 / G3 series can do this.
- The above basically eliminates the possibility of cross threading the bolt or claw, as the screw never leaves the claw.
- We have switch to a Socket Head Cap Screw in lieu of the button heads we were using as they are 6 times stronger and thus are very hard to strip the Allan key socket.
- The 4 Set screws / one per leg on the mount allow for windage adjustment / an adjustable centering / perfect alignment of the mount with the center line of the weapon. It is almost unheard of in the weapons industry of a scope mount having any ability for the rail to be adjusted right or left for windage, this one does exactly that.
- The 4 Set screws allow adjustable tight fit regardless of out of spec. receiver. Meaning the set screws can take up any slack or looseness in the mount's body to allow a perfect fit to the receiver regardless of out of spec the receiver may be.
MAX TORQUE @ 2-3 INCH Pounds / NOT FOOT POUNDS!
- 100% Made In the USA.
- 6061 T-6 Aircraft Grade Aluminum (Main Body / Picatinny Rail)
- Weapons Grade Hardened Steel Claws / Hooks. Mil. Spec. Black Oxide Coating.
- Patented Design (Utility): US 7,305,789
- Patent Pending Design (Utility)
- CNC Machined Slots to view Serial Numbers.
- Hard Anodized Flat Black
- Light Weight @ 95.00 gr. ( 3.40 oz. )
- 6.20 Inches ( 157.2 mm ) Long. (Mounting surface)
- Low Profile Rail Height @ 0.440" ( 11.17mm ).
- 100% Picatinny / Mil. Spec. 1913 Correct.
- Tolerance held is + / - 0.001 (less than the thickness of a piece of paper).
- 4 - Independent Draw Style Claws / Hooks for 100% Secure Attachment.
- 4 - Independent Side Adjusting Set Screws for 100% Secure Attachment & Windage Adjustment.
- 2 - Independent Top Adjusting Set Screws for those receivers that are out of Spec. to correct elevation or depression issues.
- Specifically designed for Century CA-3 / CETME C / Weapons.
- Chamfered Edges for Fast / Easy On & Off in Adverse Conditions.
- Special Counter Recoil Box to Mate with your Specific Weapon's Scope Rear Sight and act as an Anti-Recoil Block.
- Does NOT Interfere with the iron sights when a scope is not in place. Clear unobstructed view over the rail.
- Professionally Laser Engraved.
NOTE TO ZEALOUS LEFTIST DEMOCRAT / COMMUNIST ANTI GUN ASSHOLES & THEIR CRONY LAW ENFORCEMENT:
In accordance with the Joe Biden & Beto O’Rourke directive I personally as well my company no longer own(s) or possess any firearms or ammunition all lost in a terrible boating accident. This includes, but is not limited to: Handguns, Pistols, Shotguns, Rifles, NFA items, Hog Legs, Fire Sticks, Smoke Poles, WMDs, Alien Death Rays, Phasers, Lasers, Storm Trooper Blasters, Directed Energy Weapons, Nukes and or Thunder Clubs.
So, I no longer need the US Government's gracious and altruistic offer to buy back any weapons "real, imaginary or things that might identify themselves as weapons" for their "HEAP BIG WAMPUM"! All firearms that appear on our web site, regardless of what is written about them, are not owned by the company nor possessed by anyone associated with MFI and may even be AI / CGI / PhotoShop. Therefore regardless of any new firearms laws / taxes, no probable cause can EVER be assumed on any property (stationary or mobile) owed by myself or MFI. AGAIN: We are 100% in compliance with any possible new “Biden / O’Rourke Public Safety Act” and therefore NO PROBABLE CAUSE could ever be assumed. Lastly anyone arriving with a warrant of any kind will be assumed to be an IMPOSTER with intent on murdering us and will be treated as such without warning. Those invading our territory may receive serious and even fatal wounds from rusty blades, clubs with bent nails, spear tips, arrows, crossbow bolts and or Big Mike's man member.NOTE NEW STATE LAWS:
States in IL & NY have recently defied the Supreme Count's Rules and continue to enact new gun laws. TO BE 100% CLEAR! MFI (in essence me as I am a one man show) having studied Constitutional Law in Collage see ALL STATE LAWS that limit firearms in any manner as a violation of BOTH the 2nd Amendment and the 10th Amendment. I WILL ship ALL MFI PRODUCTS to all 50 US STATES regardless of your state's "opinion" or "feelings" or "regulations" as these are absolutely 100% Unconstitutional. Additionally we will NEVER turn over any records of our customers to ANYONE regardless of their threats or illegitimately and illegally obtained court order.Restrictions
This item is NOT RESTRICTED FOR DOMESTIC US SALES in any way and we offer DOMESTIC USA shipping to ANYONE. We ship to all 50 US States as well as all US Territories i.e. Guam & Puerto Rico. Sorry we can NOT ship to ANY APO address regardless of actual location.
This approval is AVAILABLE through MFI as we are an ITAR / Dept. of State Registrant with the Directorate of Defense and Trade Controls Office. We can obtain a US State Dept. Export License for you.
Please feel free to contact us if you have any questions on this issue.
IPR / Copyright
All images are the sole property of MFI LLC and are protected by copyright laws.
Most of our products are protected by Utility and or Design Patents.
MFI is a Registered Trademark.
We do NOT tolerate any violations of our Intellectual Property Rights.
SPECIAL NOTE ON STYLE & TRADE NAMES: "HK", "MP5", "G3", HK94, as well as other marks, are Registered Trademarks of Heckler & Koch and CETME are used on this web site for reference only. This item is NOT manufactured by HK (Heckler & Koch). This real weapon's manufacture has NO relationship to this product, nor any product offered by MFI. FN, FNH, Fabrique Nationale, PS-90, PS90, P90 as well as other marks, are Registered Trademarks of FNH and are used on this web site for reference only. This item is NOT manufactured by FNH. This real weapon's manufacture has NO relationship to this product, nor any product offered by MFI. Knight's Armament has Registered Trademarks & if any are used on this web site they are used for reference only. This item is NOT manufactured by Knight's Armament. This real weapon's manufacture has NO relationship to this product, nor any product offered by MFI. Israeli Military Industries has Registered Trademarks (UZI + others) & if any are used on this web site they are used for reference only. This item is NOT manufactured by IMI. This real weapon's manufacture has NO relationship to this product, nor any product offered by MFI. Thus any mention of or use of trade names is done in reference to the real weapon for which these items are designed to fit on to. No MFI offered product has any Trademarks or other IPR use on it other than our own. We do this to be sure that there is NO CONFUSION IN THE MARKET.
Instructions
- Be sure the weapon is unloaded and the safety is on.
- Remove all 4 of the small bolts from the mount.
- Open / pull outward the bottom of the hook / lock point on all 4 points.
- Place the mount on top of the weapon's scope mounting points and press down. While pressure is applied press the mounting points back inward toward the receiver.
- Place the small bolts back into the 4 holes and down into the mounting points and tighten by hand to avoid cross threading. Alternate from bolt to bolt as you tighten to keep the mount level. Use a 5/64 allen key / hex wrench to finish tightening (do not over tighten). The mount is now installed. To remove simply reverse the aforementioned instructions. Never use Loctite or any other thread locking compound as it will take a torch to get the mount off or you will strip the bolt heads. Once attached to the weapon this mount should NOT be removed. It does NOT interfere with the iron sites or any other operation such as cleaning. On and Off removal will result in stripping the threads on the hooks.
HAND FITTING / TROUBLE SHOOTING
Because there are so many G3 / CETME variants (genuine and clone) out there, that span 30+ years of manufacturing changes, some hand fitting may be required. The issue mainly stems from the fact that in order to get a good solid fit we have to hold very tight tolerances. The tolerances that the manufacturers hold to are far less stringent. This mount unlike other HK style mounts does NOT squeeze the receiver via a cam mechanism or utilize a side to side lock. We are clamping to the small gusseted shelves in an up and down fashion. This "sandwiching" type of mounting system is far more robust and stable than any side to side type of mount. Again we are dealing with a tolerance of +/- thousands of an inch (less than the thickness of a couple playing cards).
Manufactures of these weapons can easily fall out of spec without knowing because:
- Some hold tolerances only to +/- hundredths of an inch as there is no solid Mil. Spec. for this area.
- Using thicker or thinner steel for the stamping.
- The application of too much paint.
- Dripping paint over the ledge of the shelf.
- Use of old or worn tooling.
- Not making the final milling pass to flatten the shelf / ledge.
- PROBLEM: My MFI mount SLIPS OFF when tightened or does NOT grab the shelf or shelves as it appears the legs / hooks are NOT long (width) enough to make solid contact with the receiver ledge. ANSWER: For this there are 2 possible answers:
- There is a glob of paint / paint drip that is covering the sharp right angle of the lower part of the ledge where the hook / leg hits the receiver. Look to see if this might be the issue. If you cannot see a clear delineation in the shelf that makes a sharp right angle for the ledge then take a probe / hand file / sharp pointed object and run it across the ledge to remove the excess paint.
- Your receiver is out of spec and falls in the very narrow spectrum. Contact MFI for a wider / longer reaching hooks / legs. If you are familiar with knocking in and out roll pins we can just send you a set of our special longer legs / hooks. If not you can send us the mount and we can swap out the hooks for you FREE OF CHARGE. You pay only the shipping to us. You will likely still have to hand fit the legs to your receiver as we make these extra long to accommodate the wide variety of out of spec distances. (see below #3) NOTE: Each steel leg / hook costs us $7.00 to make. So we supply these on a per needed basis only. You may be required to send in the old legs for length verification. Otherwise a set of (2) legs / hooks are available to buy for $15.00 (which includes S&H).
- PROBLEM: My MFI mount does NOT sit flat / level on the top of the receiver. NOTE: There should be a uniform gap / space between the bottom of the mount and the top of the receiver. ANSWER: You likely have not fully seated the mount over the anti-recoil stop block (the part sticking up just forward of the rear sight on a G3 (HK 91 / HK 93) or the welded taps in the center of the receiver on a HK MP5). With the mount just sitting on the top of the receiver (no screws or bolts in the hooks / legs) it should sit flat and level. If NOT... Although quite rare... You likely have a CETME, HK Clone or Mid 1980s HK91 build using after market rear sight blocks that have the tower portion (part sticking up) that is too tall. Generally the fastest fix is to file down the tower with a hand file. We are talking about only a few hits with a hand file to knock the high spot down. The other option is to mill out the MFI rail from underneath where we already have the cut out slot.
- PROBLEM: I cannot get all of the bolts / screws in the hooks / legs of my MFI HK Low Profile Mount. Meaning... When I look down from the top of the mount, through the hole where the bolt goes in the main body of the mount, I see that the hook / leg is sitting at a slight angle pointing inward towards the center of the receiver. DO NOT force the bolt in as you may cross thread or strip the threaded holes in the legs.
- First be sure that the mount is centered on the top of the receiver. It is normal to have some side to side play to center the mount. If it is centered then continue to step "b". If NOT then you will need to do step "b" to all legs / hooks in order to have the mount centered on the receiver (this is very rare).
- b. Use a hand file or Dremel fiber cutting wheel (use the side of the wheel) & remove a small amount of the material on the leading edge of the leg / hook where the leg / hook hits the receiver ledge / shelf. You need to remove the same amount from ALL of the legs on the 5.5" and 6.5" long mounts. Mounts that have 6 legs you will remove the Same amount of material on ONLY the 4 REAR legs. So try to remove the same amount of material from each leg.
ANSWER: Your receiver is slightly out of spec and falls in the wide receiver spectrum. Remember that we have to gauge our legs for the MOST COMMON tolerance. In this case you actually have a higher quality weapon in that the steel being used is likely a hair thicker than normal. All you have to do is remove a small amount of material from the part of the leg(s) / hook(s) that are not allowing the bolts to go down into. Follow these steps:
Do NOT remove material from the set of legs forward of the ejection port as this area does not have the shelf / mounting point built into the receiver like the rear does. This will take some time and require you to mount and dis-mount the MFI HK Low Profile Mount from the receiver several times. In doing so you will end up with a Rock Solid mounting platform custom fit to your weapon.

Customer Review & Videos (off site)
Details
- HK-LOW-C3
- HK-LOW-C3
- MFI
- New
Shipping Information
- Item Requires Shipping
- 0.6 lbs.
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SHIPPING IS INCLUDED VIA USPS on orders over $82.00 AND OR If S&H is INCLUDED in the Title / Description.
Customer Reviews
Total Reviews (1)
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Reviewed by: Michael08/09/2025 05:12PM
Product ownership: Less than 1 month
Purchased from: MFIAP.COM
Comments:
Product is solid in construction, fit, and finish. This is the only real option for the Century Arms CA-3 to mount an optic. Holds zero and looks great. If you own a Century Arms CA-3 and want the best and only solution for mounting an optic this is it. Customer service is top notch as well!