Author Topic: Which fiber optic Front sight with CZC PCR Tactical Rear?  (Read 801 times)

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Offline john seeley

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Which fiber optic Front sight with CZC PCR Tactical Rear?
« on: November 07, 2017, 01:40:45 AM »
PCR Short Tactical Blank Rear Sight: https://czcustom.com/cz-parts-all/front-and-rear-sights/cz-rear-sights-all/pcr/cz-pcr-short-tac-rear-sight.html

I noticed there's 3 CZC fiber optic front sights available for this rear sight (CZ 75 PCR) which are all 5.5 mm high:
1.0  x  5.5mm  (2.75mm-blade)
1.0  x  5.5mm  (3.10mm-blade)
1.5  x  5.5mm  (3.10mm-blade)

When the blade height varies (2.75mm vs 3.1mm) with the total height being consistent (5.5mm), will the difference change the POA-POI because the fiber optic position changes? Which of these 3 do you recommend for the best POA-POI with the PCR?  Thanks.
« Last Edit: November 07, 2017, 01:42:55 AM by john seeley »

Offline Mick-S

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Re: Which fiber optic Front sight with CZC PCR Tactical Rear?
« Reply #1 on: November 07, 2017, 04:19:58 AM »
The 2.7mm and 3.1mm are the width of the front sight.
The 1.0mm and the 1.5mm are the diameter of the fiber optic rod.
Yes, the 5.5mm is the overall height of the sight from bottom of dovetail to top of sight.

POI should be the same for all three.

I like a narrow front sight. I use a .100" from Dawson. this would convert to a 2.54mm wide site
« Last Edit: November 07, 2017, 05:26:09 AM by Mick-S »

Offline john seeley

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Re: Which fiber optic Front sight with CZC PCR Tactical Rear?
« Reply #2 on: November 07, 2017, 04:56:26 PM »
The 2.7mm and 3.1mm are the width of the front sight.
The 1.0mm and the 1.5mm are the diameter of the fiber optic rod.
Yes, the 5.5mm is the overall height of the sight from bottom of dovetail to top of sight.

POI should be the same for all three.

I like a narrow front sight. I use a .100" from Dawson. this would convert to a 2.54mm wide site

Oh the blade dimension is the width. Now it's clearer. Thanks for the education.

EDIT: Doesn't Dawson or CGW sell the (non-adjustable) serrated blank rear sight specifically for the PCR? Don't see any.
« Last Edit: November 07, 2017, 07:31:34 PM by john seeley »


Offline john seeley

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Re: Which fiber optic Front sight with CZC PCR Tactical Rear?
« Reply #4 on: November 07, 2017, 11:30:05 PM »
https://czcustom.com/catalogsearch/result/?q=PCR+rear&cat=

Thanks. I was aware of CZC having them specifically for the PCR but I don't see them on Dawson or Cajun Gun Works. Petty reason I was asking was, I know Dawson and Cajun Gun works may include the nylon punch and hex wrench. Dawson offers free shipping as well. CZC does not offer free shipping nor do they include tools. I'll simply have to invest in a punch set with nylon punch(s). Thx.
« Last Edit: November 07, 2017, 11:37:57 PM by john seeley »

Offline Mick-S

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Re: Which fiber optic Front sight with CZC PCR Tactical Rear?
« Reply #5 on: November 09, 2017, 04:15:23 PM »
Order the rear from CZC and the front from Dawson. You will get a nylon tipped punch that way. ;D

Offline john seeley

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Re: Which fiber optic Front sight with CZC PCR Tactical Rear?
« Reply #6 on: November 10, 2017, 02:14:18 PM »
Order the rear from CZC and the front from Dawson. You will get a nylon tipped punch that way. ;D

That combo will work great for my PCR. No drilling required and the Dawson FO irons supposedly allow the inserts to be recessed. If I get this combo, I'll use a green insert with black rear.

However, will this CZC/Dawson combo produce a POA=POI?
Reason I'm asking is because Dawson measures the protruding height (in inches) after installation where CZC measures the total height (in mm's). Just want to make sure before I order. Thanks.

Reference:
CZC Rear:       https://czcustom.com/cz-parts-all/front-and-rear-sights/cz-rear-sights-all/pcr/cz-pcr-short-tac-rear-sight.html
Dawson Front: https://dawsonprecision.com/dawson-precision-cz-75-d-compact-fiber-optic-front-sights/ 

« Last Edit: November 10, 2017, 02:55:06 PM by john seeley »

Online Morbid1X

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Re: Which fiber optic Front sight with CZC PCR Tactical Rear?
« Reply #7 on: November 10, 2017, 02:49:57 PM »
Cz custom uses just the metric system on their website and dawson doesn't. I was doing the same thing because I didn't want to drill a CZC front sight again. Dawson's are pre drilled

Offline john seeley

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Re: Which fiber optic Front sight with CZC PCR Tactical Rear?
« Reply #8 on: November 10, 2017, 03:03:26 PM »
Thanks. Did you order a Dawson set or did you mix the brands?

Just trying to figure-out which Dawson FO front sight would match this: https://czcustom.com/cz-parts-all/front-and-rear-sights/cz-rear-sights-all/pcr/cz-pcr-short-tac-rear-sight.html
« Last Edit: November 10, 2017, 04:05:36 PM by john seeley »

Offline Mick-S

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Re: Which fiber optic Front sight with CZC PCR Tactical Rear?
« Reply #9 on: November 10, 2017, 04:15:16 PM »
CZC shows needing a 5.5mm front with that sight which should be what your oem sight is.
the front dovetail should be 2mm deep that would leave 3.5mm from top of slide to top of sight.
3.5mm = .137" so you should be good with a .130 sight.

Offline john seeley

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Re: Which fiber optic Front sight with CZC PCR Tactical Rear?
« Reply #10 on: November 10, 2017, 06:03:30 PM »
CZC shows needing a 5.5mm front with that sight which should be what your oem sight is.
the front dovetail should be 2mm deep that would leave 3.5mm from top of slide to top of sight.
3.5mm = .137" so you should be good with a .130 sight.

Amazing. Thank you Mick. The depth of 2mm for the front dovetail was the missing number I was searching for. Thanks.

EDIT: Here's the math I came-up with thanks to Mick. The rear CZC PCR tactical sight requires a 5.5mm high front sight (total height) of which 2.159mm (.085") is the dovetail. That leaves 3.341mm (.1315") in height from the slide.

.1315" compared to Dawson's height of .130" is pretty darn close.

To do the math in reverse. The height of the Dawson is .130" from top of slide. To that, add the dovetail depth of .085" and you get a total height of .215" or 5.461mm which is pretty darn close to 5.5mm.
« Last Edit: November 10, 2017, 09:54:26 PM by john seeley »

Offline Mick-S

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Re: Which fiber optic Front sight with CZC PCR Tactical Rear?
« Reply #11 on: November 11, 2017, 04:43:15 PM »
Your welcome. I just recently learned that most CZ's have a 2mm dovetail myself.
The SP-01 Shadow has a 1.5mm dovetail on the front. (I learned this the hard way)
CGW had to educate me when I ordered the wrong front for my shadow.

Offline SaurianFire

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Re: Which fiber optic Front sight with CZC PCR Tactical Rear?
« Reply #12 on: November 11, 2017, 05:28:04 PM »

EDIT: Here's the math I came-up with thanks to Mick. The rear CZC PCR tactical sight requires a 5.5mm high front sight (total height) of which 2.159mm (.085") is the dovetail. That leaves 3.341mm (.1315") in height from the slide.

.1315" compared to Dawson's height of .130" is pretty darn close.

To do the math in reverse. The height of the Dawson is .130" from top of slide. To that, add the dovetail depth of .085" and you get a total height of .215" or 5.461mm which is pretty darn close to 5.5mm.

Converting mm to inches can get you in trouble. I had been fooling around with the 25.4 multiplier and found some mm dimensions are rounded as you found out.  This CGW info for the new FO front sight for their new adjustable sight seems pretty accurate. 

Quote
Total height is .320″ (8 mm), blade height only is .260″ (6 mm),

https://cajungunworks.com/product/019-422-fiber-optic-front-sight/


.320" less .260" equals .06" for the dovetail height.  .06*25.4= 1.524mm

Also note:
Quote
SKU: 019-422Categories: P-01 & 75 Omega, Sights, Shadow 2 - Shadow - 85C, 75 Series & SP-01, CZ P-01 / PCR, CZ 97B - BD



Offline Mick-S

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Re: Which fiber optic Front sight with CZC PCR Tactical Rear?
« Reply #13 on: November 11, 2017, 05:56:15 PM »
https://dawsonprecision.com/sights/cz-sights/
Per Dawson's website:

CZ Front Sight Dovetail Depths
0.085 Deep Dovetail: CZ 75B, CZ 75 Tactical Sport, CZ 85 Combat
0.060 Deep Dovetail: CZ 75 Shadow and CZ SP-01
0.070 Deep Dovetail: CZ P09 and CZ P07

(Correct me if i'm wrong but I believe the PCR falls into the 0.085" category)

Offline SaurianFire

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Re: Which fiber optic Front sight with CZC PCR Tactical Rear?
« Reply #14 on: November 11, 2017, 08:09:20 PM »
https://dawsonprecision.com/sights/cz-sights/
Per Dawson's website:

CZ Front Sight Dovetail Depths
0.085 Deep Dovetail: CZ 75B, CZ 75 Tactical Sport, CZ 85 Combat
0.060 Deep Dovetail: CZ 75 Shadow and CZ SP-01
0.070 Deep Dovetail: CZ P09 and CZ P07

(Correct me if i'm wrong but I believe the PCR falls into the 0.085" category)

Been to this site many times and had not noticed.  ::)

I can't tell you what the PCR or P-01 dovetail depth is or what the variances for it are.

I had been trying to figure this out from info posted on line about recommended sights with mm and inches and came to the conclusion it was impossible because of rounding. The best info I had noticed I posted. Also note that the CGW site also states:

Quote
Product Description
This is the correct front sight for the Dawson/CGW fully adjustable rear part numbers 017-019 and 017-018.  Fits the standard CZ front dovetail for nearly all CZ models including 75B & P-01 Omega, 75B/BD, P-01, PCR, 97B/BD, Shadow 1 & 2, etc.

I thought .06" was pretty good info since inches was given. 

 

anything