G3 SEF Navy Style Lowers

[JayGeeWentWorth]

Numrich Gunparts Corp. has G3 SEF navy style lowers complete with internals for $99.95. These lowers are unissued, but may contain some storage marks. I purchased one in the past week and it was in flawless condition. I must say that I am very pleased with this purchase and would recommend this lower to anyone in the market for the new navy style grip.

https://www.e-gunparts.com/DisplayAd.asp?chrProductSKU=981880&chrSuperSKU=&MC=

[MicroPilot]

What makes a "Navy" style lower Navy versus ???

[JayGeeWentWorth]

Navy Style:
http://www.robertrtg.com/g3sefplasticcomplete2.jpg


Versus old style:

http://www.robertrtg.com/g3seflowercomplete%5B1%5D.jpg


The navy grips are composed of a polymer, have a more modern look, and are more streamlined. In my opinion these grips look much nicer on a rifle and also have a better feel.

[Jagman]

The navy lower does not have the molded thumb rest so it works for lefty's real well too.
Jagman

[MicroPilot]

It also looks like the lower is one piece. Is the whole thing polymer?

[JayGeeWentWorth]

Yes, it is all one piece and polymer. However, there are metal reinforcements on the front of the frame and where the front and back pins go.

[rustypirate]

Anyone buying these please keep in mind that this unit contians compliance parts, hammer, trigger, sear, trigger frame, and PISTOL GRIP.

If you replace your lower assembly with one of these polymer units, you have effectively installed an IMPORTED pistol grip, which may count as one of your compliance parts. Pistol grips were widely used for compliance parts.

These grip frames are available as US made units from PTR91.com and black-market-parts.com

[Seattlefungus]

rustypirate, the one's Numrich is selling are full auto SEF. The PTR91 model's that I have bought all have a mock-up front trigger receiver pin. These have the full auto receiver pin hole and a full auto sear... So If you buy one of these, you'll have to clip and pin it. The PTR91 milled aluminum Trigger housing should just slip right in then. so you can end up with 4 compliance parts with the housing, hammer, sear and trigger.

[rustypirate]

Yeah, I just don't want folks forgetting about the pistol grip and messing up their parts count.

[jfowl31]

How hard is it to convert a original Navy style grip to fit on a Cetme?

I got some US parts to spare on my rifle, and could get by replacing the hammer and sear probably, but I'm a little apprehensive about how hard it would be to get the shelf in there so it fits on a Cetme.

If anyone has converted an original would you mind posting pictures?

[tanstaafl4y]

I couldnt get my cetme triggerpack to work with the Navy Lower (the Saftey lever on the Navy is longer than standard and incompatable with my cetme trigger pack), but the Navy lover works perfect on my Greek Sar-8.

[Seattlefungus]

Jord, If you wanted to use one, the PTR91 US made is your best bet. You'd have to by the complete unit. Counts as 5 US parts. Then you still have to modify the fake front trigger pins off the Navy grip to allow full forward seating. The fake pins don't clear the Century receivers mag well. It will work without modification on a JLD PTR91 receiver.

[Seattlefungus]

tanstaafl4y, the Navy would work if you used HK fire controls. It might work if you used a CETME selector, maybe. That I haven't tried. The HK uses selection cutouts for SEF Hk internals and the CETME"S are located indifferent location inside.. So, just thinking out loud, if I had the HK navy already and a clipped and Pined CETME fire control, I might try just using the CETME selector.. Who knows. I do know the HK and CETME selectors are not interchangeable between fire controls. Tried that by mistake.. grabbed one from the wrong bin and couldn't figure out what was happening, till I looked at the switch. They have a different thumb curve.

[tanstaafl4y]

.. So, just thinking out loud, if I had the HK navy already and a clipped and Pined CETME fire control, I might try just using the CETME selector..

The CETME Selector Lever (Crossbar portion) is 1/8" too short.

I haven't tried to use a "standard" G-3 Lever in the Navy Pack, but that gives me something to try this evening. I'll report back tomorrow.

[rustypirate]

You need to have a special selector lever for the G3 to fit the navy lower.

No CETME selector levers were made to fit these lowers, so if you want to use one3, you must convert to a full g3 trigger pack.

[tanstaafl4y]

Rusty: Thats the same thing I was thinking. Just to confirm you cannot use a "standard" cetme lever with cetme trigger pack. You cannot use a "standard" G3- lever with g-3 trigger pack...You must use a G-3 (Semi auto converted) trigger pack with the extended Navy selector lever.

[rustypirate]

exactly

[texlurch]

What about the longer G3 Navy selector, with a CETME internal trigger pack, in the Navy lower?

Reason I was wondering is RobertRTG sells the Navy lower, clipped and pinned, with the longer selector.

But if I had to go to the G3 pack, that wouldn't be that big of deal.

[snakomatix]

I actually like the G3 trigger pack a little better. To me, it seems a little counter-intuitive to push the selector UP to fire the way the Cetmes are set up.

The G3 has safe up at the top, needing to press the selector down to fire. This feels a lot better to me anyways..

[texlurch]

Used to be the G3 US parts were all over, but they are drying up lately