P99 New ( see Slide in Picture) P99 Old Design ( see Slide in Picture) P99 Compact Walther P99 and P99 Compact Schematic Position # Part # Description 1 2627248 Polymer Sight Set 1 - 6 #4 is Standard 1 2627205 #3 Front Sight Polymer 1 2627213 #4 Front Sight Polymer Standard 1 2627221 #5 Front Sight Polymer 1.1 2627167 Polymer Front Sight Grub Screw 1.1 2698331 Screw for the steel front sight 1.2 2679906 Steel Front Sight #3, White Dot 1.2 2674386 Steel Front Sight #4, White Dot Standard Height 1.2 2679949 Steel Front Sight #5, White Dot 1.2 2697971 Steel front sight #3, 3.5mm, Phosphor 1.2 2697963 Steel front sight #4, 3.8mm, Phosphor 1.2 2697980 Steel front sight #5, 4.1mm, Phosphor 3 2627132 P99 Slide 9mm x 19 Old Design S&W 3 2647885 P99 Slide 9mm x 19 Stainless Steel No Stamp 3 2648733 P99 Slide 9mm x 19 3 2680378 P99 Slide 9mm x 19 Old Design AS No Stamp 3 2680726 P99 Slide 9mm x 19 AS No Stamp 3 2680734 P99 Slide 9mm x 19 AS S&W 3 2681366 P99 Slide 9mm x 19 DAO S&W 3 2681480 P99 Slide 9mm x 19 QA S&W 3 2684641 P99 Compact Slide 9mm x 19 AS 3 2684772 P99 Compact Slide 9mm x 19 DAO S&W 3 2684896 P99 Compact Slide 9mm x 19 QA S&W 4 2624851 Decocker 5 2708663 Extractor 9x19 5 2627477 Extractor 9x19 Old Design 6 2627582 Extractor plunger assembly 6.1 2627574 Spring for extractor plunger 6.2 2627566 Extractor plunger 7 2624214 Spring for extractor and Magazine catch 8 2627183 Rear sight, white dot, assembly, polymer Standard 8 2710170 Steel rear sight PS #1, 3.8mm, w/ Pin 8 2732106 Steel rear sight PS #2, 4.6mm, w/ Pin 8 2732084 Rear Night Site Limited QTY Pressed in w/Pin 8.1 2627736 Rear sight windage screw 8.2 2627752 Rear sight, white dot, polymer 8.2 2663449 Steel rear sight PS #1, 3.8mm 10 2627795 Rear sight plunger assembly (for polymer sight ) 10.1 2441225 Spring for rear sight plunger (for polymer sight ) 10.2 2627744 Rear sight plunger (for polymer sight ) 10.3 2708043 Pin 4x12 for steel rear sight 11 2627442 Striker spring keeper 12 2627370 Striker spring 13 2627353 Striker guide 14 2627337 Striker return spring 15 2627302 Striker assembly 15.1 2778131 Striker 16 2624338 Trigger return spring 17 2709309 Trigger Bar Guide 2.8 18 2627604 Safety plunger assembly 19 2680467 Barrel 9mm x 19 4” ET 19 2688417 P99 Compact Barrel 9mm x 19 20 2624770 Slide end cap 21 2625164 Standard Recoil guide rod Assembly 21 2625156 Recoil guide rod assembly 48N Weaker Spring 21 2688697 P99 Compact Recoil Guide Rod Assembly 22 2625458 Pin 3x28 23 2624753 Takedown catch 24 2753057 Trigger Assembly 24 2624273 Trigger Assembly Old Style 25 2624117 Slide stop lever left side operation only 25 2770024 Slide stop lever assembly Ambidextrous 26 2624168 Slide stop lever pin 28.5 mm 26 2684004 Slide stop lever pin 30.5 mm 27 2625482 Takedown catch pin 28.1 2249375 Barrel lock spring 28.2 2625253 Barrel lock 2.7 mm 28.2 2709791 Barrel lock 2.45 mm 29 Frame SN Part Not Available 30 2624141 Slide stop lever spring Left Side style 30 2663473 Slide stop lever spring Ambidextrous 31 2624443 Pin 3x24 32 2759519 Sear housing 9mm x 19 assembly 32 2624397 Fire Control Assembly 9x19 32 2665867 Original P99 Fire Control assembly 32.8 2759501 Adjustable trigger bar guide 33 2796481 Magazine 9mm 10 round 33 2796465 Magazine 9mm 15 round 33 2796546 Magazine 9mm 20 round 33 2796473 P99 Compact Magazine 10 rd no finger rest 33 2796490 P99 Compact Magazine 10 rd with finger rest extension 35 2625440 Pin 4x16 36 2624192 Magazine Release 36 2679981 Magazine Release Extended 38 2703262 Backstrap S 38 2703271 Backstrap M 38 2703289 Backstrap L 38 2693046 P99 Compact Backstrap L old style Dotted 38 2693054 P99 Compact Backstrap S old style Dotted 38 2678152 P99 Compact Backstrap S new style Checkered 38 2678187 P99 Compact Backstrap L new style Checkered 39 2618265 Follower 41 2670089 Magazine butt plate keeper 41 2499436 Magazine butt plate keeper 42 2688514 P99 Compact Magazine Flat Butt Plate 42 2688522 P99 Compact Magazine Finger Rest Butt Plate 42 2704331 Magazine butt plate 10 rd 9mm 42 2704374 Magazine Butt Plate 16 rd 9mm and 12 rd .40 43 2628015 Magazine spring 16 rd 43 2618257 Magazine Spring 10 rd 44 2679221 Extractor Spring 48 2625440 Pin 4x16 P99 P99 .40 S&W Specific Parts 3 2647851 P99 Slide .40 Stainless Steel Walther USA 3 2680386 P99 Slide .40 Old Design No Stamp 3 2681293 P99 Slide .40 AS No Stamp 3 2681307 P99 Slide .40 AS S&W 3 2681421 P99 Slide .40 DAO S&W 3 2681544 P99 Slide .40 QA S&W 3 2684705 P99 Compact Slide .40 AS 3 2684713 P99 Compact Slide .40 AS S&W 3 2684837 P99 Compact Slide .40 DAO S&W 3 2684951 P99 Compact Slide .40 QA S&W 5 2787385 Extractor .40 5 2637103 Extractor .40 Old Design 7 2679221 Spring for extractor .40 19 2680459 P99 Barrel .40 S&W 19 2688867 P99 Compact Barrel .40 S&W 24 2624273 .40 S&W Trigger Assembly Old Design 32 2771217 Sear housing .40 assembly 32 2636859 Fire Control Assembly .40 S&W Old Design 33 2796503 Magazine .40 10R 33 2796520 Magazine .40 12R 33 2796503 P99 Compact Magazine 8 rd no finger rest 33 2796520 P99 Compact Magazine 8 rd with finger rest extension 35 2788772 Pin 4x16 39 2666235 Magazine Follower .40 S&W 42 2704358 Magazine Butt Plate 10 rd .40 43 2637251 Magazine Spring .40 S&W 12 RD 2648326 Pistol case 2796627 Phosphor Sight Set Front and Rear Steel w screw 2796635 P99 Compact Magazine Grip Extension to use full size Mag.