The Standard Model (SM) does not provide an empirical explanation for the variation in properties such as mass, charge, and spin among point-like fundamental particles. It also does not explain certain phenomena, including dark energy, dark matter, the observed asymmetry between matter and antimatter, neutrino mass and oscillation, and gravity. Additionally, some experimental observations differ from its predictions. This paper presents a new particle model (NPM), which characterizes fundamental particles as composite entities with internal structure. The NPM aims to address major anomalies and unresolved puzzles in the SM and offers testable predictions that extend beyond the SM. The following are key insights from the NPM: ---- The elementary particles described in the Standard Model (SM) may not originate from a single event like the Big Bang; instead, they could be produced sequentially from more fundamental particles. Each particle possesses internal constituents that govern properties including mass, spin, and charge. The orbital coupling and spin of constituents determines the flavour of the particles. ---- Electromagnetic forces are suggested to arise from gravitational interactions, with strong forces forming atop electromagnetic forces, and weak interactions representing the disruption of strong forces. ---- According to the NPM, a quark is defined as a charged lepton bound by a gluon, sharing the same electric charge as its corresponding lepton, which explains matter-antimatter asymmetry. This perspective prompts a need to reevaluate theories regarding quark fractional charges and quark confinement. ---- The compositions of many charged mesons proposed in the SM are not supported by the NPM that offers alternative compositions for these particles, which allows better explanation for meson properties and behaviours like meson decay and meson oscillation. ---- In the NPM framework, the neutron is made up of four valence quarks in a uud-d core structure, which breaks isospin symmetry but better explains beta decay, nuclear forces, and observed data. ---- In NPM, gluons are made of two photons and have mass and flavor, offering an empirical view of QCD. Free gluons explain many dark matter behaviors, while bonded gluons are found in hadrons. ---- According to the NPM, neutrinos are emitted photons that keep coupling traits and inherit flavors from parent particles like gluons and leptons. Neutrino oscillation occurs through interactions with free gluons. ---- Unlike String Theory, the NPM presents testable predictions. For instance, recent high-energy collision experiments at CERN SPS involving argon and scandium nuclei revealed an unexpectedly high number of up quarks post-collision. The NPM explains this result using the uud-d core structure of neutrons and predicts similar outcomes in all high-energy collisions between isotopes with more neutrons than protons; an increased neutron count correlates with a higher detected charged K quark yield (thus more up quarks) relative to expectations.