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My GSG-522 lightly modded

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Hi All,

I just wanted to post a thread on my very first rifle... Never owned a real one and it sure feels great... I also would have never thought of trying to modify a firearm but with the help of "the Mod section" I was able to do so with ease... A big thnx especially to Kilibreaux and Popcop45 for showing pics on modifying the hammer strut over on the Mod section.. My gun, ate all the ammo I fed it.. Very pleased.. Hope to get more accessories in the near future and add another tactical 22.. A Sig522..

BTW: if anyone has a good gun cleaner they can suggest that won't eat up the camo paint please lmk..


HKS pins

Screw Set


Trigger mod

Hammer strut mod

Crayola mod


[img width=800 height=600]http://i679.photobucket.com/albums/vv155/zumzum5150/SAM_0018.jpg

[img width=800 height=600]http://i679.photobucket.com/albums/vv155/zumzum5150/SAM_0001.jpg


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Nice looking GSG!

I see you still have the factory rear and front sight and grip housing/selector.

The rear drum is fairly pointless for actual shooting...it was nothing more than a modification to appease HK.  Go here to find a REAL HK sight that has a proper aperture and is adjustable for elevation: http://rrages.com/sight/g3drum/index.htm ($29 shipped ain't bad)

OF if you demand the "purist" MP-5 sight:  http://rrages.com/sight/mp5sight/index.htm ($69 shipped)

I have the first and like it a lot.  A friend bought the more expensive model because he wanted the oversized aperture.

Go HERE for the "conversion kit" if you want to install a proper RING front sight, smooth grip housing, and wide, paddle style selector:


This also replaces the cocking handle with an HK spec "half moon" style.  The only downside is you lose the camo pattern on your cocking tube because the original parts are black only (as with all original issue GSG-5's) however you GAIN a real front sight ring that compliments your REAR sight aperture (assuming you have mounted a genuine HK rear sight) and you end up with FAR, FAR better sighting.

Another feature that comes with the conversion kit is a metal receiver top insert which does away - unfortunately with your plastic top insert which has two miniature screws holding that plastic rail on.  The metal version however works correctly with all HK spec clamp-on type mounts including an anodized aluminum version...a LOT sturdier and actually secure.

My friend has the camo pattern and he liked the look of the black cocking tube against the camo receiver.

Also you can go to either:

www.rrages.com  or

http://www.robertrtg.com/pofmp5greenstockset.html  for the OD green version

for REAL HK stocks which are quite robust and durable.

Just a few ideas to help you along with your new toy...it's addictive to say the least.

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  • 2 weeks later...

thnx guys for the comments.. And thnk  you Kilibreaux for adding those links.. went and picked up the conversion kit which feels a lot better.. I hated the newer handgrip with molded bnump.. it felt like I was gripping a cheese grater which was bad  expecially for one that has carpal tunnel syndrome.. I was bout to get some more after market parts but decided to hold off until I get the ejector replacement.. Have any of you guys notice if your ejector has this problem? shows of splitting in the middle...pic added..

[img width=800 height=600]http://i679.photobucket.com/albums/vv155/zumzum5150/SAM_0032-1.jpg

[img width=800 height=600]http://i679.photobucket.com/albums/vv155/zumzum5150/SAM_0035.jpg

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The extractor is fine.  The marks are the result of it being "punch formed" from a thick sheet of steel.  Believe me, of all the problems you're likely to encounter with the GSG, the extractor ain't one of 'em.

Just remember, the GSG demands highvel ammo to cycle those massive, twin recoil springs.

The GSG LOVES highvel ammo after the hammer strut mod which correctly delays bolt opening with the combined pressure of the hammer spring and twin recoil springs.

I would however, like to mention that your firing pin appears of the "thick" variety, and this can absolutely negatively impact reliable cartridge detonation.  AFTER I stoned mine down to about half that thickness (matched my P-22 firing pin thickness), I ordered one from ATI that arrived with the same "thinner" thickness!  Imagine that!

Another aspect of the firing pin worth looking at is the thickness of material extending beyond the impact point.  The idea is to limit firing pin force because this portion will contact the breech block.  To improve cartridge ignition one can carefully stone the flat portion of the firing pin which results in the firing pin creating a deeper impression in the case.  If you read enough GSG related posts you'll quickly discover a great many people describe total ignition reliability for the first 500 or so rounds, then start to have failures to fire with "light strikes"...this is the result of the normal process of the gun "shooting in" and the firing pin becoming a bit shorter (we're talking thousandths of an inch).  The initial "cure" is to stone that upper, flat portion of the firing pin, and the next area is to carefully enlarge/elongate the firing pin retaining pin hole so the pin can physically move further forward, which of course compliments the purpose of honing down the "flat" portion.

I'm not sure how fully hardened the OEM firing pin is, but I noted that a replacement arrived with obvious "bluing" indicating tip hardening which may be part of an ongoing product improvement process.  Since the firing pin is impacted on the back, and said impact is transmitted to the "nose" a certain amount of "shortening" is bound to occur and that's okay as long as one knows that the "cure" to the sudden onset of light strikes and ignition problems is to lengthen the firing pin retaining pin hole....don't worry about enlarging it too much because the only downside would be the firing pin "head" would protrude more than usual, but as long as the firing pin return spring is in place, ignition should remain viable.

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  • 7 months later...

My gsg522 as of now.. so far its eating up 3300 of winchesters,fed, and CCi with only a handful of FTF.. the strut mod I did to it has worked flawlessly,.. I was recently with a bud and the guy next to our booth had a new GSG522 that was having so much problems with stovepipes and FTF.. I told em about the strut mod so hopefully hill see this.. JD if you see this its Steve ... Oh and I finally got my second rifle a couple of days ago and can't wait to fire it..


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