+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

CMMG, Inc MK9 Buffer Assembly 90CA9B4 Gun Model: Kahr Arms MK9, Additional Features: Carbine, 17% Off w/ Free S&H

CMMG, Inc MK9 Buffer Assembly, 9mm, 90CA9B4
CMMG, Inc MK9 Buffer Assembly, 9mm, 90CA9B4
1 of 1 images
CMMG, Inc MK9 Buffer Assembly, 9mm, 90CA9B4

Tap Tap to Zoom

Government Restriction Government Restriction
Questions & Answers
How Manu ounces does the buffer weigh? Expert Answer

This buffer weighs approximately 5oz.

by Jonathan D., Gear Expert, July 2, 2018
Is this suitible for use in an AR9 ? Expert Answer

Yes, it would work as long as you aren't trying to run a shortened PDW type stock.

by Carly R., Gear Expert, October 13, 2017
View All Q&A You Have a Question? Ask!
Customer Reviews
Helpful Positive Review
9mm buffer by Roger, July 12, 2018
I used this bolt carrier group in a 9.5" barrel AR pistol build with a Faxon 9mm SAAMI barrel, it ran flawlessly and cycled quickly and smoothly. This was Colt-SMG 9mm build rather than a Glock magazine build, however this will work for Glock magazin...
Read More...
1/1 found this helpful
Most Recent Reviews
Perfect Fit by Niko, February 24, 2018
This was an exact replacement for the CMMG 9mm. OpticsPlanet had fast shipping and the best price. Great product and great service! I was happy with the purchase. I wish the weight for 9mm carbine buffers was standardized upon because with so many di...
Read More...
Most Recent Reviews
Works well by Michael, Verified Owner, December 20, 2017
Nicely made buffer that works great in my 9mm AR build. Slows down the cyclic rate enough to use some pretty hot ammo without any malfunctions. Would highly recommend it to others building a 9mm rifle.
Read All 3 Reviews
Gun Model:
Kahr Arms MK9
Additional Features:
Carbine

Code: 2CM-BFA-90CA9B4

MPN: 90CA9B4

UPC: 815835013503

List: $64.15Save 18%
$52.89

Product Info for CMMG, Inc MK9 Buffer Assembly

Buffer Assembly, Carbine, Mk9image

Specifications for CMMG, Inc MK9 Buffer Assembly:

Manufacturer: CMMG
Gun Model: Kahr Arms MK9
Additional Features: Carbine

Package Contents:

  • CMMG, Inc MK9 Buffer Assembly

CMMG, Inc MK9 Buffer Assembly Orderable Models

List of Orderable Models

  • CMMG, Inc Buffer Assembly, MK9, Carbine, 90CA9B4 , MPN: 90CA9B4 , UPC: 815835013503 , Code: 2CM-BFA-90CA9B4
Compare (0)
1 item has been added
Add at least two items to compare
Last updated 2026-09-03 UTC.