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In my relentless quest for an HK53 kit, I noticed that hkspecialist.net has an HK53, and states that no modified 53 parts were used, including the 53 front sight instead of the 93 front sight.

What is different about a 53 front sight? I thought they were all interchangeable, because any adjustment needed is done at the rear sight.
 

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In my relentless quest for an HK53 kit, I noticed that hkspecialist.net has an HK53, and states that no modified 53 parts were used, including the 53 front sight instead of the 93 front sight.

What is different about a 53 front sight? I thought they were all interchangeable, because any adjustment needed is done at the rear sight.
I read the same info and compared my 93 to my 53 and they are different. I can post images if you want.

Thanks....
 

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Some 53's were converted by using the existing 33/93 barrels. The barrels were cut to correct overall length and threaded to accept the factory flash hider (most common 15x1), while some were done in 1/2x28 (to accept AR15 muzzle attachments). Think of the 53 triple frame as the same as an MP5 frame (thicker for the 3 lugs to slip pass). The 53 barrel has a thicker area to attach onto the triple frame.

The chopped barrel is obviously thinner and the front sight (triple frame) will no longer fit in this area. The conversion consists of welding/silver soldering a spacer which fits the outside diameter of the chopped barrel and the inside diameter of the triple frame.

Most conversions are not noticeable (depending on who worked on it) and is just as robust. The triple frame usually has three spot welds (4 o'clock, 6 o'clock, and 8 o'clock). If I were to convert a 93/33 over to 53 dimensions, I'd mill out these three spots with a 3/16 end mill.

The spacer would be TIG welded at 4 and 8 o'clock. I would then mill out the spacer at 6 o'clock with a 1/8 or 3/16 end mill. The barrel spacer should fit snug. I would then TIG weld the barrel at 6 o'clock. The barrel is finished after the sling loop is installed.
 
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