Genuine Glock® 20 or 21 Lower Parts Kit OEM Gen 3 | G20 LPK G21 LPK from Marine Gun Builder. Frame is for illustration purposes only and not included.
 
Please note - if you are building a PF45 you will need the SF version of this kit. See store for availability.
 
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 G21 Trigger from Glock - It is stamped 4256-3 on the cruciform. This is the one you want. The previous 2 versions sit too low in the frame causing a failure to return to battery problem.
 
(B) The ejector must be stamped 8196-2 for solid reliable ejection. Avoid buying a kit with the old 8196 ejector.
 
(C) The slide stop lever is 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. It will be stamped 5427-1 on the inside of the part.
 
Every Patriot who chooses MGB for their Freedom parts will receive a code shipped with their purchase for a Free Self-Paced Frame Assembly Online Course at Freedom Crew University.
 
MGB Guarantee:
I individually inspect each package for first time quality. When you buy from MGB, you are buying Authentic Genuine Glock® products.
 
This OEM Kit will provide perfect fitment and flawless function with the following frames:
- Glock G20 or G21 Gen 2-3
- All Gen 3 Glock 20/21 non-sf 3D printed lowers
 
All Parts in this Kit are factory OEM Glock® and include:
1. Trigger Bar SP04417 (Smooth Faced Shoe)
2. Trigger Housing SP08203
3. Connector SP00343
4. Trigger Spring SP00350
5. Slide Stop SP05423
6. Slide Lock SP00301
7. Slide Lock Spring SP05446
8. Trigger Pin SP00420
9. Locking Block Pin SP04368
10. Trigger Housing Pin SP00427
11. Mag Catch Spring SP00280
12. Mag Catch Button SP01035
 
Unmatched Value:
√ Ships within 24hrs (Mon-Fri)
√ Free Shipping
√ Free Self-Paced Assembly Course
 
Glock 20 Glock 21 Lower Parts Kit OEM LPK Gen 3 G20 G21 LPK by MGB
Glock 20 21 SP04417 SP08203 SP00343 SP00350 SP05423 SP00301 SP05446 SP00420 SP04368 SP00427 SP00280 SP01035
 
Disclosures & Policies:
1. USA Shipping Only - No International Sales
2. We will not ship to alternate names/addresses - Shipping is to purchaser and address on their billing account only
3. Frames, Blocks, Rails, or other items in pictures are for illustration only and not included with the OEM Lower Parts Kit.