G17 & Polymer80 Compatible GEN3 RS1FS9 Black

Had to return a swenson slide due to over machining of the rear sight, decided to give these guys a try. I don't base my purchases off everyone's reviews, I'd rather form my own opinion, so here it is. The fit and finish was good. Had a issue trying to get the gun to fire once assembled it was resolved by adjusting the trigger bar down a little bit. Other than that minor hiccup, I would say it's a pretty good slide. It cycles flawlessly, it does have some play in the slide, but for $200 range it's acceptable I'm my eyes.

This is my SECOND Glock 21 slide from RockslideUSA and NEITHER WORKED! I did not buy here but from Mfr site.The slide is NOT milled correctly! The standard Glock Firing Pin does NOT fit!!! It will not fire! Worthless! I had one, they sent me another, and it still does not work! The slide will not fire because it firing pin does not have the correct inner bore-they made it round. A Glock 21 Firing Pin is elongated, not round!Trigger will NOT work without Firing Pin being able to contact the primer.Have seen other problems with this, thought RockSlidesUSA had solved them, apparently not! Don't fall for theirs because it is cheap. They are selling cheap because they DO NOT work!Buyer Beware!!

Would not completely into battery when firing unless there was only 1 round in the magazine. Slide cracked after about 200 rounds. The coating layer is too thick in places it shouldn't be and it is rough leading to energy loses.

So originally, i bought two slides. One for me, and one for my wife. Mine had a slight defect. I called, and Susan answered the phone. She was very nice and helpful. She said they’d replace the defective slide with a new one under warranty. I mailed out the defective slide Monday morning, and had a brand new one by Saturday, of the same week. Excellent customer service, and excellent warranty!

Purchased from Rockslide. Fit was horrible. After racking it about 100 times, was finally smoothing out a bit. Installed Holosun and noticed it was protruding off one side of the slide. Sight mounting holes were off centered on slide. I explained problem, sent pictures and they said send it back. Paid $20 to send it back insured priority mail. To my surprise I received the exact slide back with a snotty note saying there was no problem. Don’t buy this piece of absolute garbage.

I didn’t buy this from Amazon, I got it from them complete with parts kit and barrel. It’s JUNK! The slide was so out of spec the only way it would move on the frame is by hitting it with a rubber mallet. The rear cover plate only come off by prying it. The company offered no support except to tell me it’s my frame even though I tried it on another one. Do not buy this junk, I’m pretty sure these aren’t made in the USA either.

I didnt order from Amazon's page. I ordered straight from Rock Slide USA. Man what a great company. My g19 has probably 800 rounds with a mixture of steel, aluminum, and brass eats everything. They have a life time warranty that they stand behind too. Great company. For more information do a YouTube search and checkout a channel called Delta D80. He's had two off these one in a g19 and one in a g26. This company make them for all different calibers and frames. So go check them out. You'll be glad you did.

I purchased this slide from Rockslide USA. It fit poorly. The machining was rough. I mounted an RMR on a glock 27 frame. I sort it 9 times and the point of aim movedslide and shot it all over. I checked the tightness of the RMR screws and onof the studs was broken of. When asked to warranty the slide Rockslide USA stopped communication with me.