BudsGunShop.com - What exactly did LTT do to this model?

Hi Sean, according to Landon Tactical web site. -- Ernest's PX4 Compact Carry
What’s included:
ArmorLube DLC treated slide, barrel and cam block. ArmorLube has a lower coefficient of friction and greater hardness than any other coating on the market and has withstood thousands of rounds on our test guns with almost no visible wear
Complete LTT Trigger Job:

GrayGuns flat trigger
LTT Optimized Performance Trigger Bar and Trigger Job
Chrome Silicon 11# hammer spring

The PX4 Compact Carry DOES NOT include a compensator, but does includes a Streamlight TLR-7 SUB. As of May 1, 2024, We are waiting on an update to the compensator product for the compact's as customers are having a hard time maintaining the compensator on the PX4 Compact Carry. We are waiting on improvements that will potentially require less maintenance.
Black Springer Precision Magwell, one 140mm extension and two flush base pads for the other two magazines
Rubber Talon grips
Engraved LTT logo
The Compact features a rotating 3.2” barrel, a 15+1 round capacity, an accessory rail, low-profile slide stop, and a cold hammer forged barrel for ultimate precision. Includes two 15rd magazines with Springer Precision base plates and one extend 19 round magazine.
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Details here >>> https://langdontactical.com/ernest-langdons-2024-px4-blackout/

Hi Sean and welcome. Some details are touched on in the description. The rest can be found starting around 5:00 here : youtube.com/watch?v=JcJFJTw60dg