+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

Photo is wrong ...shows a gas piston bcg - SIG SAUER Bolt Carrier Assy, M400

by D Mac, Verified Owner from SC, United States Written on February 10, 2018
Review for SIG SAUER Bolt Carrier Assy, M400
SIG SAUER Bolt Carrier Assy, M400
SIG SAUER Bolt Carrier Assy, M400
Currently Unavailable View Product
Write a Review View All Reviews
Compare (0)
1 item has been added
Add at least two items to compare

D Mac's Review of SIG SAUER Bolt Carrier Assy, M400

I ordered a BCG for a M400 and that's what I got ....A semi-auto BCG for my M400 in the typical SIG plastic bag ...Chrome lined carrier and key ....Key was properly staked ....Good looking BCG ....No SIG markings ....No MPI marking on bolt
Pros:
  • Properly staked Key
Cons:
  • Semi Auto Carrier
  • Not SIG marked
Best Used for:
  • M400 and other ARs
Would Recommend: Yes
10 of 10 found the following review helpful.
Was it helpful to you? Yes | No
Share
Last updated 2026-09-17 UTC.