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Some photos of the aforementioned modified SAR K12 Sport:

I’m actually selling a heavily upgraded version SAR K12 Sport on GunBroker right now: My intention in sharing this is honestly not about selling it but capturing for posterity what upgrades work and which don’t, along with links to all the items. This has been a fun / crazy journey and want to give back to the community.First: a special shout out to Henning Wallgren (of Henning Group) who patiently helped me at various points on this journey, and who actually has a SAR K12 and could test fit certain items (rather than just guess).Main Points (I go into more detail later): Most (not all) internal parts for the Tanfoglio Small Frame will work Henning Group and Patriot Defense are a great source of upgrades for Tanfoglio I’ve been told that it’s most similar to a Tanfoglio Witness Elite Limited, but I can’t confirm that Magazines: takes standard CZ 75 magazines Rear sight: EAA SUPER SIGHT (LPA/Bomar style) Front sight: some weird Tanfo-specific thing (you’ll be surprised which Dawson front sight actually works… see below) What DIDN’T work (so you learn from my mistakes) Henning Base pads on OEM SAR K12 mags Issue: They will slide on but they will just pop right off when they hit the ground. Easy solution: just buy regular Mec-Gar CZ75 mags and put the same Henning Base pads on those. They work perfectly. Henning extended firing pin (H051-TL X-Long Firing Pin for Tanfoglio, HENNING GROUP - X-Long Firing Pin for Tanfoglio) Issue: It would have required modification for both length and taper Easy solution: Patriot Defense has one that just drops in RedX Gear holster Issue: really tight fit, and terrible customer service (that’s a whole saga in itself) Easy solution: modify it or buy a different one (perhaps there are more options now?) What DID work (so you learn from my successes)INTERNALS Henning Group (I ended up with a 2.4 lb trigger) Flat Trigger System: HENNING GROUP - Flat Trigger System for Tanfoglio Wolff Hammer Spring - 14lb: HENNING GROUP - Wolff Hammer Spring for Tanfoglio EGW Prepped Hammer: HENNING GROUP - EGW Prepped Hammer for Tanfoglio EGW Prepped Sear: HENNING GROUP - EGW Prepped Sear for Tanfoglio Patriot Defense Patriot Defense Optimized Firing Pin Spring: Patriot Defense | Tanfoglio Optimized Firing Pin Spring Patriot Defense Extra Power Extractor Spring: Patriot Defense | Tanfoglio/CZ Extra Power Extractor Spring Tanfoglio Extractor (11.1): Tanfoglio | Witness Extractor (11.1) (301738) Tanfoglio Extractor Pin: Tanfoglio | Witness Extractor Pin (11.2) (301739) Tanfoglio Firing Pin - Extended: Patriot Defense | Tanfoglio Firing Pin - Extended EXTERNALS Front Sights: after much research, turns out that a suitable replacement is for the Desert Baby Eagle Dawson Precision Desert Eagle Baby Eagle Fiber Optic Front Sights (.135" Tall x .125" Wide Ramped Serrated) 050-970: Dawson Precision Desert Eagle Baby Eagle Fiber Optic Front Sights These are the OEM fiber optic upgrades, but they are always out out of stock: Witness Standard Fiber Optic Front Sight Rear Sights: EAA SUPER SIGHT (LPA/Bomar style) OEM is an LPA TRT96TA07: LPA Ghilardi I wanted to mount a red dot, so went with EGW Red Dot Mount for Trijicon RMR / SRO, Holosun 407c / 507c Mount: Trijicon RMR / SRO, Holosun 407c / 507c Mount for EAA Super Sight LOK Grips Tanfoglio Palm Swell Bogies (select Small Frame and Short Length): Tanfoglio Palm Swell Bogies Magazines Mec-Gar CZ-75 Magazine: HENNING GROUP - Mec-Gar Magazine Henning Magazine Extension: HENNING GROUP - Henning Group Magazine Extension for CZ 75, Shadow 2 & Dan Wesson DWX Compact Henning Grams Format Follower Kit: HENNING GROUP - Henning Grams Format Follower Kit for Mec-Gar CZ-75B Small Frame magazines and H141-MC17 pad In case you’re really set on getting OEM Mags, this is where to get them: SAR-USA by SARSILMAZ Pistol Magazines FYI… I worked with a gunsmith who is also a competition shooter who understands performance and tuning. In addition to installing and fitting all of these parts, he also Chamfered outside edge of firing pin hole Polished breech face and rails Ramped and polished the feed ramp Magwell: perfect blending of removal of any edges (see photo) Overall polish and deburr