Have had this on a 'Zev Tech' build, it has been fired but it's mainly been a display piece.

Its Guns Modify so pretty much the best frames there are in my opinion, its been lightly sanded flat on the top to ensure that the slide cycles perfectly.  I've left the mag release on as it's perfect for the scallop cut on the frame.

Currently £51 + shipping + import duties + royal mail 'handling' charge (Grrrrr), if you buy from rainbow8.  I recon about £70-80 this way (which is what it cost me).

https://www.rainbow8.com/collections/glock-series/products/gunsmodify-polymer-gen-3-rtf-frame-for-marui-g-series-s-style-black

I'm looking for £50 inc. postage.  PayPal only please.  Let me know if you need any further pictures.  Thanks.