Holsters that fit the Glock 21 Gen3 with a Streamlight TLR-8
No maker I track lists this combination yet. Try the Glock 21 page; most makers cut one shell for the family. Or see every Glock 21 Gen3 fit.

Any lightNo light 278Streamlight TLR-1 HL 31SureFire X300U 27Streamlight TLR-1 24Streamlight TLR-7A 23Streamlight TLR-7X 13SureFire X300T 12Streamlight TLR-1 HP-X 10Streamlight TLR-7 10SureFire X300V 8SureFire XC3 8Streamlight TLR-6 7Streamlight TLR-8A 6Streamlight TLR-2 4Streamlight TLR-7 HL-X 4Arisaka Pistol Light 1Inforce Wild1 1Inforce Wild2 1Olight PL-Pro 1
How to read the badges
- Maker confirmed The maker names this exact model on the product page.
- Maker lists it The maker lists it, but the wording was loose enough that you should read the quote before buying.
- Likely fit Matched through the base model or base light. Most makers cut one shell for the family, but check the quote.
Questions
Will a Glock 21 holster fit the Glock 21 Gen3?
Often, but not always. Makers usually mold one shell for a model family, but generation changes to the trigger guard, rail or slide can break retention. Prefer a holster whose listing names the Glock 21 Gen3, and read the quote before buying.
How does holstercheck verify a fit?
I crawl each maker's product pages and record the gun and light named in the variant list or compatibility text. Every result shows that text with a link to the page it came from, and the date it was last seen. Loose wording is marked as such rather than hidden, and readers can report whether the holster fit their gun.