+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

JMac Customs GFH 1/2-28 KeyMount - KeyMicro Muzzle Device GFH-28S-KM Color: Black, Finish: Nitride, $10.99 Off w/ Free S&H

JMac Customs GFH 1/2-28 KeyMount, KeyMicro, GFH-28S-KM
JMac Customs GFH 1/2-28 KeyMount, KeyMicro, GFH-28S-KM
JMac Customs GFH 1/2-28 KeyMount, KeyMicro, GFH-28S-KM
JMac Customs GFH 1/2-28 KeyMount, KeyMicro, GFH-28S-KM
JMac Customs GFH 1/2-28 KeyMount, KeyMicro, GFH-28S-KM
JMac Customs GFH KeyMount - KeyMicro Muzzle Device, 1/2-28 Thread, Black, GFH-28S-KM
JMac Customs GFH 1/2-28 KeyMount, KeyMicro, GFH-28S-KM
JMac Customs GFH 1/2-28 KeyMount, KeyMicro, GFH-28S-KM
1 of 7 images
JMac Customs GFH 1/2-28 KeyMount, KeyMicro, GFH-28S-KM
JMac Customs GFH 1/2-28 KeyMount, KeyMicro, GFH-28S-KM
2 of 7 images
JMac Customs GFH 1/2-28 KeyMount, KeyMicro, GFH-28S-KM
JMac Customs GFH 1/2-28 KeyMount, KeyMicro, GFH-28S-KM
3 of 7 images
JMac Customs GFH 1/2-28 KeyMount, KeyMicro, GFH-28S-KM
JMac Customs GFH 1/2-28 KeyMount, KeyMicro, GFH-28S-KM
4 of 7 images
JMac Customs GFH 1/2-28 KeyMount, KeyMicro, GFH-28S-KM
JMac Customs GFH 1/2-28 KeyMount, KeyMicro, GFH-28S-KM
5 of 7 images
JMac Customs GFH 1/2-28 KeyMount, KeyMicro, GFH-28S-KM
JMac Customs GFH KeyMount - KeyMicro Muzzle Device, 1/2-28 Thread, Black, GFH-28S-KM
6 of 7 images
JMac Customs GFH KeyMount - KeyMicro Muzzle Device, 1/2-28 Thread, Black, GFH-28S-KM
JMac Customs GFH 1/2-28 KeyMount, KeyMicro, GFH-28S-KM
7 of 7 images
JMac Customs GFH 1/2-28 KeyMount, KeyMicro, GFH-28S-KM

Tap Tap to Zoom

Government Export Restriction Government Export Restriction
Government Restriction Government Restriction
Questions & Answers
Will this fit ar platforms? Expert Answer

Yes, the JMac Customs GFH 1/2-28 KeyMount will fit AR platform rifles that utilize 1/2x28 threads. It will also fit 9mm rifles with 1/2x28 threads as it features a 10mm bore.

by Ethan, Gear Expert, October 23, 2023
Is it compatible with Sig Rattler 300 BLK?

No, the rattler has a pitch of 5/8x24

by Ivan, Verified Owner, November 30, 2022
View All Q&A You Have a Question? Ask!
Customer Reviews
Helpful Positive Review
It sings like a soprano by Zachary G., Verified Owner, January 18, 2023
Works great as a flash hider, and I'm sure it fits the keymo adapter (will update with confirmation later), but my goodness, how it sings! Everything you do on your firearm, from bumping it around to actuating the bolt to dry-firing the trigger, this...
Read More...
4/4 found this helpful
Most Recent Reviews
best flash hider around by Gunguy, Verified Owner, January 22, 2026
Ive used many flash hiders in the past and this one i feel suppresses the flash the best it is also made out of the best materiel over the other which is aluminum so alot of rapid fires you wont have to worry about
Most Recent Reviews
JMac Customs GFH 1/2-28 KeyMount - KeyMirco Muzzle Device by Hollow, Verified Owner, May 26, 2024
I looked all around fora different style of muzzle device. One that looks good & has a great price. I'm extremely satisfied thank you opticsplanet.
Read All 3 Reviews
Color:
Black
Finish:
Nitride
Fabric/Material:
17-4PH Stainless Steel
Threads per Inch:
1/2x28
Gun Make:
Kalashnikov
Weight:
4.4 oz

Code: 4VI-BFH-JMC0258-GFH-28S-KM

MPN: GFH-28S-KM

List: $109.95Save 10%
$98.96

  • JMac Customs GFH KeyMount - KeyMicro Muzzle Device, 1/2-28 Thread, Black, GFH-28S-KM
  • Heresy Design Silencer Timing Device, 1/2in Threads, Black, HSTDA
As low as $107.91
You Save Up to 10%
OP Bucks$2.16

ATTENTION! We currently do not ship this product to CA, IL, NY, WA , and U.S. Territories. Please see our policies for more information.

Product Info for JMac Customs GFH 1/2-28 KeyMount - KeyMicro Muzzle Device

(G)36(F)lash(H)ider(28)1/2-28 thread pitch(S)houlderMount(KM)KeyMount. In order to use this device with a suppressor, it must be installed by a professional - to ensure it is properly mounted and aligned. Do NOT shoot without checking alignment with bore rods. JMac Customs is not responsible for any damage to the suppressor, or any injury resulting from improper installation. Some firearms are NOT suitable suppressor hosts, just because you can thread this muzzle device on, does NOT mean it is safe to use.image

The GFH is a combination of the German G36 flash hider and DeadAir Silencers KeyMount.

SHIMS ONLY NEEDED FOR TIMING.

Specifications for JMac Customs GFH 1/2-28 KeyMount - KeyMicro Muzzle Device:

Manufacturer: JMac Customs
Color: Black
Finish: Nitride
Fabric/Material: 17-4PH Stainless Steel
Threads per Inch: 1/2x28
Gun Make: Kalashnikov
Weight: 4.4 oz

Features of JMac Customs GFH 1/2-28 KeyMount - KeyMicro Muzzle Device

  • G36 Style Flash Hider Comp with KeyMount Feature

Package Contents:

  • JMac Customs GFH 1/2-28 KeyMount - KeyMicro Muzzle Device

JMac Customs GFH 1/2-28 KeyMount - KeyMicro Muzzle Device Orderable Models

List of Orderable Models

  • JMac Customs GFH KeyMount - KeyMicro Muzzle Device, 1/2-28 Thread, Black, GFH-28S-KM , MPN: GFH-28S-KM , Code: 4VI-BFH-JMC0258-GFH-28S-KM
Compare (0)
1 item has been added
Add at least two items to compare