What Variation of No 4 Rear Sight is This?
Retrieved: 06/02/2014

I just purchased this sight out of the classifieds. It looks like a Mk.1, but there does not seem to be any battle peep sight, and there is an aperture disk mounted to the backsight slide. What variation is this sight?

MVolkJ
Nov 23, 2011

If I recall correctly, that's the rear sight from a No.7 .22 caliber trainer. They were based on the No.4, but I don't believe the rear sight can be fitted to a stock No.4 without modification.

coolhandluke
Nov 24, 2011

After looking at photos of a No.7 sight and speaking with the seller I don't believe that it is a No.7. The sight was removed from a No.4 MK I rifle and the yardage markings on the No.7 sight are different. I am wondering if it is a standard MK I sight that has had the battle peep removed so that the aperture disk could be installed.

Anyone have photos of a Mk T rear sight? I'm not having any luck locating any detailed photos of one. I know that the battle peeps were removed from these sights as well.

MatchGrade303
Nov 24, 2011

Can you show a pic from the side and behind so show how the peep is attached to the slider?

Enfield trader
Nov 25, 2011

It is not a No.7 sight, it looks to be a Mk1 sight that had the battle peep milled off and was threaded to accept an eyepiece. I have seen several of these over the years.

Tommy Atkins
Nov 25, 2011

Looks like a "TFM" (Unofficial modification) to me.

A lot of shooters drilled out the oversize existing peep, threaded the new hole & screwed in an eye-cup with a much smaller peep in it.

Tikirocker
Nov 25, 2011

Parker Hale also made a windage adjustable version of the No.4 Mk1 sight with the large peep like the one shown above. This looks like a custom job to me also.

Alan De Enfield
Nov 25, 2011

Yes they did but it requires irreversible modifications to your rifle. Often sold on ebay at 'cheap' prices as anyone who 'knows', won't touch them.

Tommy Atkins
Nov 25, 2011

If I recall correctly there was also a windage adjustable sight that replaced the rear peep & allowed no modifications to the receiver. Essentially you stripped down the rear sight & replaced the non-adjustable vertical slider with an adjustable one & then re-assembled.

Alan De Enfield
Nov 25, 2011

I think you may be refering to the Parker Hale 8/53.

The mounting screw fits thru' the existing peep-hole on the 'slider' and gives you instant 'windage'.

No disassembly needed, no damage to your rifle, easily removed when you sell (heaven forbid) the rifle.

coolhandluke
Nov 25, 2011

Thanks for the info guys.

I'm hoping that it will be drilled and tapped to the standard Parker Hale thread so that I can replace the eyepiece with a 6 hole PH eyepiece.

muffett2008
Dec 04, 2011

The PH 4 is the full windage adjustable sight designed for the No.4 and was available from 1946, whereas the 8/53 was not designed until 1953.

Alan De Enfield
Dec 04, 2011

Just remember that the 'drill to fit' sight that I showed was actually designed to go onto a .22rf training rifle. The calibrations will be wrong for .303 and you will not get full elevation for long range shooting (the 8/53 sight has the same 'problems')

Alan De Enfield
Dec 04, 2011

MatchGrade303 wrote:
[] well, that changes everything unless I feel up to scrubbing the settings and marking my own.

I realise that they are 'pricey' but the correct sights for the job are either the PH5C or the AJP 4/47.

I reckon 5C prices have now dropped to around the US$200 mark which may (in effect)double the price of the rifle in the USA - but - when the rifles cost (maybe) US$600 in the UK its only 1/3rd of the price of the rifle.