+1-800-504-5897 Help Center Check Order Status
About Us Policies Reviews How To
Free Shipping & Free Returns*

FREE SHIPPING on Over 250,000 Products

Shop now and get Free Value Shipping on most orders over $49 to the contiguous 48 states, DC, and to all U.S. Military APO/FPO/DPO addresses.

Enjoy our FREE RETURNS

We want to ensure that making a return is as easy and hassle-free as possible! If for any reason you are not satisfied with your purchase, simply return the item within 30 days of receipt, and we'll cover the cost of return shipping. Learn more about our Return Policy.

  • Entire Store
  • ...
  • Apparel & Footwear
  • Astronomy
  • Everything Else
  • Eyewear
  • Hunting Gear
  • Lab Equipment
  • Military Gear
  • Outdoor Gear
  • Photography Equipment
  • Police, EMS & Fire
  • Shooting
  • Sport Optics
  • Sports & Hobbies
TIP
Shopping Cart

Trinity Force Steel Micro Gas Block

Trinity Force .875 Micro Gas Block Steel, Black GT875FB
Trinity Force .625 Micro Gas Block Steel, Black GT625FB
Trinity Force .875 Micro Gas Block Steel, Black GT875FB
1 of 2 images
Trinity Force .875 Micro Gas Block Steel, Black GT875FB
Trinity Force .625 Micro Gas Block Steel, Black GT625FB
2 of 2 images
Trinity Force .625 Micro Gas Block Steel, Black GT625FB

Tap Tap to Zoom

Questions & Answers
is it steel, or aluminum. Descriptions says both Expert Answer

MPN: GT625FB is a steel gas block.

by Armando R., Gear Expert, December 30, 2019
View All Q&A You Have a Question? Ask!
Color:
Black
Coating:
Hard Coat Anodized Finish
Fabric/Material:
Aircraft Grade Aluminum
Gas Block Journal Size-Diameter:
.875 in
Weight:
1 oz

Code: TRN-RGB-SMGB-GT875FB

MPN: GT875FB

UPC: 812530026227

Product No Longer Available

Product Info for Trinity Force Steel Micro Gas Block

.875 - Low Profile Gas Block fits all AR 15 and LR 308 rifles with .936 barrels. Replaces front sight and requires 10-Inch or longer free float handguard for enhanced reliability.image

.625 - M4 Carbines and M16A2 A3 and A4 rifles with a .750 barrel. Replaces front sight and requires 10 or longer free float handguard for enhanced reliability. .625 internal diameter

For your safety, Trinity Force recommends this part be installed by a competent, qualified gunsmith/installer with an understanding of the weapon platform that the part is being installed on. Always make sure the firearm is unloaded and pointed in a safe direction when working.

SKU: GT875FB

Package Contents:

  • Trinity Force Steel Micro Gas Block

Related Products to Trinity Force Steel Micro Gas Block

Image of Atrius Development Forced Reset Selector 7 models Atrius Development Forced Reset Selector (134) As Low As (Save Up to 16%) $189.99 Blazin' Deal
Image of Atrius Development Forced Reset Selector 7 models Atrius Development Forced Reset Selector (134) As Low As (Save Up to 16%) $189.99 Blazin' Deal
Image of DFCO Kung Fu Grip Plug DFCO Kung Fu Grip Plug (24) List: $12.00 $11.99 Best Rated
Image of DFCO Kung Fu Grip Plug DFCO Kung Fu Grip Plug (24) List: $12.00 $11.99 Best Rated
Image of DFCO Kung Fu Grip Plug DFCO Kung Fu Grip Plug (24) List: $12.00 $11.99 Best Rated
Image of Breek Arms AR-15 Warhammer Mod2 Ambidextrous Charging Handle made-in-usa-flag 4 models Breek Arms AR-15 Warhammer Mod2 Ambidextrous Charging Handle (571) List: $54.95 (Save $5.00) $49.95 13% Coupon
Image of Breek Arms AR-15 Warhammer Mod2 Ambidextrous Charging Handle made-in-usa-flag 4 models Breek Arms AR-15 Warhammer Mod2 Ambidextrous Charging Handle (571) List: $54.95 (Save $5.00) $49.95 13% Coupon
Image of Breek Arms AR-15 Warhammer Mod2 Ambidextrous Charging Handle made-in-usa-flag 4 models Breek Arms AR-15 Warhammer Mod2 Ambidextrous Charging Handle (571) List: $54.95 (Save $5.00) $49.95 13% Coupon
Image of Breek Arms AR-15 Warhammer Mod2 Ambidextrous Charging Handle made-in-usa-flag 4 models Breek Arms AR-15 Warhammer Mod2 Ambidextrous Charging Handle (571) List: $54.95 (Save $5.00) $49.95 13% Coupon
Image of Radian Weapons Glock 43X/48 Anchor and Pistol Magwell 3 models Radian Weapons Glock 43X/48 Anchor and Pistol Magwell (52) As Low As (Save Up to 33%) $109.99 5% Bonus Bucks
Image of AS Designs Arc-Fire V2 Non-Ambi Kit AS Designs Arc-Fire V2 Non-Ambi Kit (13) $199.99 Best Rated
Image of AS Designs Arc-Fire V2 Non-Ambi Kit AS Designs Arc-Fire V2 Non-Ambi Kit (13) $199.99 Best Rated
Image of DFCO Kung Fu Grip, Black 13 models DFCO Kung Fu Grip, Black (137) As Low As (Save Up to 15%) $19.99 13% Coupon
Image of DFCO Kung Fu Grip, Black 13 models DFCO Kung Fu Grip, Black (137) As Low As (Save Up to 15%) $19.99 13% Coupon
Image of DFCO Kung Fu Grip, Black 13 models DFCO Kung Fu Grip, Black (137) As Low As (Save Up to 15%) $19.99 13% Coupon
Image of Strike Industries Polymer FSA Picatinny Folding Stabilizing Brace Strike Industries Polymer FSA Picatinny Folding Stabilizing Brace (12) List: $99.95 (Save 10%) $89.95 Best Rated
Image of Strike Industries Polymer FSA Picatinny Folding Stabilizing Brace Strike Industries Polymer FSA Picatinny Folding Stabilizing Brace (12) List: $99.95 (Save 10%) $89.95 Best Rated
Image of Kaw Valley Precision Stainless Steel Heavy Tungsten Buffer 2 models Kaw Valley Precision Stainless Steel Heavy Tungsten Buffer (59) As Low As (Save Up to 11%) $99.95 Best Rated
Image of Kaw Valley Precision Stainless Steel Heavy Tungsten Buffer 2 models Kaw Valley Precision Stainless Steel Heavy Tungsten Buffer (59) As Low As (Save Up to 11%) $99.95 Best Rated
Image of Kaw Valley Precision Stainless Steel Heavy Tungsten Buffer 2 models Kaw Valley Precision Stainless Steel Heavy Tungsten Buffer (59) As Low As (Save Up to 11%) $99.95 Best Rated
Image of Atrius Development G-Lever Ambidextrous Forced Reset Safety - Geissele Specific Atrius Development G-Lever Ambidextrous Forced Reset Safety - Geissele Specific (27) List: $269.00 Add to Cart for Your
Special Price Blazin' Deal
Image of Atrius Development G-Lever Ambidextrous Forced Reset Safety - Geissele Specific Atrius Development G-Lever Ambidextrous Forced Reset Safety - Geissele Specific (27) List: $269.00 Add to Cart for Your
Special Price Blazin' Deal
Image of Superlative Arms Adjustable Bleed Off Gas Block 16 models Superlative Arms Adjustable Bleed Off Gas Block (302) List: $99.99 (Save 10%) $89.99 13% Coupon
Image of Superlative Arms Adjustable Bleed Off Gas Block 16 models Superlative Arms Adjustable Bleed Off Gas Block (302) List: $99.99 (Save 10%) $89.99 13% Coupon

Trinity Force Steel Micro Gas Block Unavailable & Discontinued Models

List of Unorderable Models

  • Trinity Force .875 Micro Gas Block Steel, Black, GT875FB , MPN: GT875FB , UPC: 812530026227 , Code: TRN-RGB-SMGB-GT875FB
  • Trinity Force .625 Micro Gas Block Steel, Black, GT625FB , MPN: GT625FB , UPC: 812530026210 , Code: TRN-RGB-SMGB-GT625FB
Compare (0)
1 item has been added
Add at least two items to compare
Last updated 2026-08-22 UTC.