Genuine Glock® 21SF or 20SF Lower Parts Kit OEM Gen 3 from Marine Gun Builder. Every Glock part is Factory Authenic. Check listings before you buy - most of these listings are not "complete" 21SF/20SF parts kit, but still charge you Full Premium OEM prices. All kits should come with every part - spare parts are a necessity for all firearm owners. Most of the G20SF and G21SF kits on ebay have the wrong parts. Whether you choose MGB as your OEM Freedom parts provider or not, you must insure the kit you are buying includes: (A) The latest G20/G20SF G21/G21SF Trigger from Glock - It is stamped 4256-3 on the cruciform. This is the one you want. The originals sit too low in the frame causing a failure to return to battery problem. (B) The trigger housing pin is different from all other models of Glock and specifically made for the Short Frame. Builders are constantly buying kits on ebay and getting the standard Glock TH Pin. This will stick out on both ends of the grip. It needs to be Glock SP01774 for SF models. (C) The slide stop lever is also different from all other models. A standard Glock Slide Stop will periodically jam you up. Insure the kit you buy has Glock SP05423 Slide Stop Lever and Spring for SF Models. (D) The trigger housing for the 20sf/21sf is Glock SP05406. Do not buy listings that use the standard housing they will not fit. Normal 0 false false false EN-US X-NONE X-NONE If you need the standard G20 G21 non SF version - I carry them in my store. If they are out of stock, message me and I can make a kit for you from individual parts. Here is the listing for the Standard Kit: https://www.ebay.com/itm/126263918165 Don't get swindled on Ebay by sellers who swap out parts to poorly made clones and pass them off as Authentic OEM Glock® factory parts. Ebay listings for OEM kits are flooded with counterfeit triggers, fake upgraded ejectors, and reproduced MIM parts. These fraudulent parts are not stamped or original branded OEM Glock® parts. More importantly, they lack required manufacturer Quality Controls with no extensive test firing and proper safety protocols in place. The failure rate in our build community using these imitation parts is staggering. Read my full Blog post "Glock OEM vs. Knockoffs" to ensure you are buying genuine factory Glock® OEM parts. MGB Guarantee: I individually inspect each package for first time quality. When you buy from MGB, you are buying Authentic Genuine Glock® products. All Parts in this Kit are factory OEM Glock® and include:1. Trigger Bar SP04417 (Smooth Faced Shoe) 2. Trigger Housing SP05406 3. Connector SP003434. Trigger Spring SP003505. Slide Stop SP054236. Slide Lock SP003017. Slide Lock Spring SP05446 8. Trigger Pin SP004209. Locking Block Pin SP0436810. Trigger Housing Pin SP0177411. Mag Catch Spring SP0028012. Mag Catch Button SP01035 Unmatched Value: √ Free Shipping √ Free Returns for ANY Reason Glock 21SF Glock 20SF Lower Parts Kit OEM LPK Gen 3 G21SF G20SF LPK by MGB. Glock 21sf 20sf SP04417 SP05406 SP00343 SP00350 SP05423 SP00301 SP05446 SP00420 SP04368 SP01774 SP00280 SP01035 Listing Disclosures & Policies: 1. USA Shipping Only - No International Sales 2. We will not ship to alternate names/addresses - Shipping is to buyer and address on their Ebay account only 3. Frames, Blocks, Rails, or other items in pictures are for illustration only and not included with the OEM Lower Parts Kit. 4. Do not contact MGB via social media, by email, or other platforms about ebay items - communicate through the ebay system only.5. Please do not send messages with offers above or below the listing price.