Can it run with a slide installed red dot?

Yes, it is compatible with a slide mounted RMR. However it won’t be compatible with any of our charging handles. You can just use the optic itself to rack the slide.

Are you able to replace the buttstock with any other AR buffer tube style buttstock?

Yes, the 20/20X buffer tube is compatible with any aftermarket mil-spec stock/brace

Does this fit the s&w gen 1 m&p full size 45 acp? it has a rail and beaver tail.

Compatible with the M&P Mod 1 Full Size or Compact 9mm/40 models with a rail and no safety (not compatible with the “C” Sub-Compact versions).Please note: Your pistol must have an extended beavertail and no safety.

Will this work with my S&W M&P 2.0 9mm?

No, the 20/20X is not compatible with the S&W M&P 2.0 9mm.

I have a S&W M&P 40 full size (not 2.0) Does this fit that model? Thank you

It should be compatible with M&P (Full-Size or Compact) 9mm/.40 models that have a rail and do not have a manual safety. This is not compatible with M&P C (“Subcompact”) models. Your gun must also have an extended beavertail — if it doesn’t, the fit won’t work.

Is this compatible with Geisler 19X 80% builds ?

No, it is not compatible with Geisler 19X.

Does not list the Glock 20 Gen 4 in the compatible guns list but says in the description that it is. Which one is it? Can I use this with my G20 Gen 4 or not?

The 20/20X is not compatible with the Glock 20 Gen 4. Alternatively you can get the 20/21X stabilizer kit for large-frame Glocks through the link below. Just make sure to select the correct model when placing the order.20/21X Stabilizer Kit

Is this compatible with the 20/20TFA conversion to turn it into a carbine?

Yes please note that it only fits the 20/20X for standard-frame Glocks and is not compatible with large-frame Glocks.

It says it’s compatable with the pf940c but you said it’s not p80 compatible. Is it or not

As of now, we don’t have a chassis for the 20/20X that’s compatible with the P80. Our team is currently working on this and will be adding it to the product page soon.

Does this chassis have the upgraded metal pic rail for your optic?

No, the 20/20X have the standard Upper Rail. Only the S-Pro has the metal upper rail.

Will it fit a Glock 27 Gen 3?

Yes, the 20/20X is compatible with the Gen 27 Gen 3.

Will this fit a Glock 40 MOS 10mm like the 20/21? If so, what is the difference?

No, the 20/20X is not compatible with large-frame Glocks like the G40 MOS. Due to its larger dimensions, the G40 will not fit into the chassis.

Is this compatible with Glock 34 mos?

Yes, the Glock 34 MOS is compatible with the new 20/20X.

When I try to order it only let's me choose "Glock" for gun type.....if I choose that, will it fit my P80, or do I need to wait for the P80 version to drop?

It says right on the description that the 20/20X fits Glock, P80, and S&W........So i guess that is wrong ???

Will this work on s&w m&p 10mm or the 5.7?

It is only compatible with M&P Mod 1 Full Size or Compact 9mm/40, with a rail, no safety (not compatible with C “Sub Compact” versions). Your gun must have an extended beaver tail with no safety. If the M&P gun does not have an extended beaver tail, then it will not fit.