+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

I'm building a 10.5 .300BLK pistol build with a SBA4 brace. Planing on shooting subsonic rounds. Would this buffer work & with what spring? — 4 Answers

by Bill, from TX, United States Asked on January 16, 2020

Name Dark Storm Industries DS-15 H2 Carbine Length Buffer 4.5 oz (4.4)
$37.99 $31.99 Save 16%
View Product
Write a Review
Continue As a Guest
Saving...
Sign In or Create an Account (optional)
or Register
Why use an OpticsPlanet.com account for my questions and answers?

Having an account with OpticsPlanet.com makes writing questions and answers even better! We’ll save all of your questions and answers in your account, provide you easy access to them, so you can see how the community has responded.

If you’d like to add a question without creating an account, you can proceed with filling out the fields on this form.

Show
Sort by
Filter by
Expert Answer
A
Answered by Jonathan D., Gear Expert, from IL, United States, on February 23, 2020

For sub-sonic rounds a standard carbine weight buffer is recommended.

1 of 7 found the following answer helpful.
Was it helpful to you? Yes | No
Share
A
Answered by BlkBetty, member, from SD, United States, on June 18, 2021

That guy is wrong, wrong. Suppressed short barrel, actually, any suppressed should use a H buffer. Preferably a H2 or possibly H3.

2 of 2 found the following answer helpful.
Was it helpful to you? Yes | No
Share
A
Answered by John E. Law, member, from NY, United States, on August 28, 2020

If you are shooting those subsonic rounds suppressed I would go with a H2 buffer

2 of 2 found the following answer helpful.
Was it helpful to you? Yes | No
Share
A
Answered by ZLRider, member, from IL, United States, on May 11, 2023

I just spoke with the folks at Sprinco Recoil Solutions regarding this very situation. I have a 10.5" barrel .223 MilSpec bolt, carbine gas system, tube, spring and buffer which is currently ejecting in the 1:30-2:00. I will eventually be suppressing it (I know, I know) so it will get a adjustable gas block then. They suggested one of their Orange springs with an H3 buffer. That is their heaviest spring. Tests seem to indicate a heavier spring with a lighter buffer tends to give better reliability.

Was it helpful to you? Yes | No
Share