Just a quick counting the number of native, still in production full frame lenses that are available now for the Pentax K-1. from 15mm all the way to 560mm: not bad at all, lor! 
 
		 
I think another FF lens still in production but often forgotten by many, that will be Pentax FA 35/2. 
Added FA50/1.4 to the list too. 
-    Pentax HD DFA 15-30/2.8 SDM WR
-    Pentax DFA 24-70/2.8 SDM WR
-    Pentax DFA 28-105/3.5-5.6 DC WR Kit lens
-    Pentax FA 31/1.8 Limited
-    Pentax FA 35/2 
-    Pentax DA 35/2.4
-    Pentax HD DA 40/2.8 limited (remove the rounded hood)
-    Pentax FA 43/1.9 limited 
-    Pentax FA 50/1.4 
-    Pentax DA 50/1.8
-    Pentax DA* 55/1.4 SDM WR
-    Pentax HD DA 70/2.4 Limited
-    Pentax HD DFA* 70-200/2.8 DC AW
-    Pentax FA 77/1.8 Limited
-    Pentax DFA 100/2.8 Macro WR
-    Pentax HD DFA 150-450/4.5-5.6 DC AW
-    Pentax DA* 200/2.8 SDM WR
-    Pentax DA* 300/4 SDM WR
-    Pentax HD DA 560/5.6 SDM AW