Gitaar met 3 tot 5 instrumenten, K
| Naam | Compositie | bezetting | |
| Kagel | Mauricio | Sonant (1960) | gtr-hrp-cb-sl.w |
| Kagel | Mauricio | Tremens (1963/65) Szenische Montage | e.gtr-b.gtr-e.cb-e.org-perc-tape |
| Kaufmann | Armin | Quartettino III, Op. 52 (gtr-vl-vla-vc) | gtr-vl-vla-vc |
| Kernis | Aaron Jay | 100 Greatest Dance Hits | gtr-str.kwa |
| Kernis | Aaron Jay | 2 Awakenings and a Double Lullaby | zang(sop)-vl-gtr-pno |
| Klartag | Yair | Nothing To Express | e.gtr-str.kwa |
| Klemola | Sami | Meanwhile in the jungle (1998) | hob-vl-vc-3gtr |
| Koshkin | Nikita | Guitar Quintet | gtr-str.kw |
| Koshkin | Nikita | Quintet for guitar & string quartet | gtr-str.kwa |
| Krenek | Ernst | Hausmusick (1959) 7 pieces for 7 days of the week, | vl-bl.fl-gtr-pno |
| Kubizek | Augustin | Quartetto da camera (hob-kl-fag-gtr) | hob-kl-fag-gtr |
| Kubo | Mayako | IWDH (1998) voor strijkkwartet en electr. Gitaar | e.gtr-str.kwa |
| Küffner | Joseph | Introduktion, Thema und Variationen Op.32 | kl-str.kw |
| Küffner | Joseph | Notturno für Violine Flöte, Bratsche und Gitarre, Op. 110 | fl-vl-vc-gtr |
| Küffner | Joseph | Quintetto, guitare & quatuor à cordes, op. 156 | gtr-str.kw |
| Kummer | Caspar | Fluit Kwintet in C gr.t., Op. 75 | 2fl-vla-gtr-vc |
| Kutávicius | Bronius | Sigute, vargo mergele, as tavo broli (1993) | voc(sop)-sax-gtr-2pno-perc |
| Kutávicius | Bronius | The Clocks of Past (1977) | gtr-str.kwa |