Home CMMG T.REX Lower Parts Kit | Overview

T.REX Lower Parts Kit | Overview

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The T.REX Lower Parts Kit is a bare-bones kit that doesn’t come with a trigger guard, grip, or a fire control group. We prefer these kinds of kits because they allow us to choose our parts based on our preferences instead of swapping out the parts we don’t like and ending up with unnecessary spares that pile up over time. This kit is made for us by Schmid Tool, has no MIM parts, and meets or exceeds Mil-spec standards.

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27 COMMENTS

  1. While the disconnector and bolt catch plunger springs are similar, they are different. Particularly, the disconnector spring is wider on the bottom end than the top, if you put this in recess for the bolt catch spring, it is entirely possible it binds and catches in the hole, removing tension on the plunger and bolt catch itself which will cause issues with cycling, feeding, lockback, etc. Don't mix them up.

  2. $50 is frankly overpriced for this parts kit. Little yo no mention of where these parts are sourced and this is hardly an upgrade over a typical milspec parts kit that comes with a ambi safety. Youd be better off buying a lower parts kit for $25 and then catching a radian talon on sale for $30 and then you'll be miles ahead.

  3. When it comes to the bolt catch installation; if using a USGI FCG, install the FCG first and use the hammer to keep the bolt catch from moving around. Makes for a stupid easy installation of the bolt catch….

    I can hear the nay-sayers now “BuT iT dOeSn’T wOrK”; yes it does. I’ve used this method a lot, because being lazy makes some things easier. Not having to use your third hand to hold the bolt catch is really helpful

  4. Off topic question; other than length, what's the diff between the Trex Arms "lightbar" and the Arisaka Inline scout mount? Specifically, why Shouldn't the inline mount be used to cantilever the scout light. Much thanks of this gets answered!

  5. FYI for all the new people. During the installation of the first pivot pin that he installed, you will one day send that detent and spring into space it will fall into the Bermuda triangle never to be seen again. My suggestion is to have extras until your skills are honed.

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